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Papers by Jean Roefstra

Research paper thumbnail of Villers-le-Temple- a quick scan into the archaeology and building history.

SHA Templar studies number 1 , 2020

Archaeological and architectural history quick scan of vaults and corridors under the existing co... more Archaeological and architectural history quick scan of vaults and corridors under the existing commandery of the Knights Templar, later Order of Saint John. There are indications from archaeological finds, among other things, that the complex already existed in the 12th century.

Research paper thumbnail of Kastelenonderzoeker Jaap Renaud (1911-2007) in Noord-Holland (extra lange versie

Kennemer Verleden, Historisch Genootschap Midden-Kennemerland, 2021

O p 25 maart 2007 overleed Jaap renaud op de leeftiJd van 96 Jaar. Hij was kasteeldeskundige bij ... more O p 25 maart 2007 overleed Jaap renaud op de leeftiJd van 96 Jaar. Hij was kasteeldeskundige bij uitstek, historicus, bouwhistoricus, archeoloog, docent, voor een deel autodidact, breed georiënteerd en tot op hoge leeftijd betrokken bij de ontwikkelingen in de kasteelarcheologie. Als een der eersten in Nederland was hij ervan overtuigd dat het onderzoek naar het fenomeen 'middeleeuws kasteel' breed moest worden aangepakt. Hij was van mening dat het kasteel onder meer als historisch, archeologisch, typologisch en literair object moest worden bestudeerd om zo het object in zijn totaliteit te kunnen begrijpen. Deze gedachtegang was de basis voor de integrale en interdisciplinaire aanpak van het kastelenonderzoek, zoals we dat tegenwoordig kennen en nastreven.

Research paper thumbnail of Heemskerk | Kasteel Assumburg

De archeologische kroniek van Noord-Holland 2021, 2022

Onderzoek naar de voorganger van kasteel Assumburg te Heemskerk

Research paper thumbnail of Velsen – Santpoort-Zuid | Ruïne van Brederode

De archeologische kroniek van Noord-Holland 2021, 2022

Research paper thumbnail of Bloemendaal | Terrein voormalig huis Aelbertsberg

De archeologische kroniek van Noord-Holland 2021, 2022

Research paper thumbnail of Voormalige voorburcht van kasteel Oosterwijk

De archeologische kroniek van Noord-Holland 2021, 2022

Geofysisch onderzoek van een voormalige 13e eeuwse voorburcht kasteel Oosterwijk, Beverwijk.

Research paper thumbnail of Geopgysical survey abbey Egmond-Binnen

Research paper thumbnail of Geofysisch Proefonderzoek Kasteelterrein Oud Haerlem Te Heemskerk

De archeologische kroniek van Noord-Holland 2019, 2020

Research paper thumbnail of Kasteel Oud Haerlem te Heemskerk. Een kort bestaan maar een lang verhaal (with summary in English)

‘Die hofstat daer dat huys op plach te staan’ Recent onderzoek naar kastelen en buitenplaatsen, eindredactie: T. Hermans & R. Gruben, Stichting Kastelenstudies Nederland ism SPA uitgevers, 2022

Jean Roefstra Oud Haerlem Castle at Heemskerk A short existence but a long story The origins ... more Jean Roefstra
Oud Haerlem Castle at Heemskerk
A short existence but a long story
The origins of Oud Haerlem Castle can apparently be connected directly to a charter by the count of Holland William II (1234-1256) and king of the Holy Roman Empire (1247- 1256). By that charter, dated 16 October 1248, William and his brother Florens transfer their own property the ‘Hof te Heemskerk’ with accessories to the knights Simon II of Haarlem and Wouter of Egmond through sale. Simon II of Haarlem leaves his castle in the town of Haarlem in 1249 to live in Heemskerk as his main residence instead. In view of the short period between 1248 and 1249, the question arises whether or not the castle was built beforehand. In 1351, the castle was
destroyed completely and its inhabitants killed during an internal war. The Netherland’s most renowned castle researcher Prof Dr J.G.N. Renaud explored a small part of the castle terrain in 1943 and 1960-1965. In the December 1960 issue of the staff magazine of the company Hoogovens, Renaud published a plan of the irregularly squared supposed outer bailey with small towers, a sally port (?) and a projecting entrance structure, an oblique tower. Renaud dated this complex between
c. 1250 and 1351. Typologically speaking this plan is largely identical to that of Grunsfoort Castle in Gelderland. For Oud Haerlem Castle a remarkable find was a bronze treasure trove of 15 objects, until today the largest late medieval
bronze treasure ever found in the Netherlands. Further archaeological research has not been undertaken. A study of Renaud’s materials after his death in 2007 confirmed his dating, but questions rose about the interpretation of the alleged outer bailey. Research by excavation however has become impossible due to the area’s designation as an Archeological National Monument in 1975. In 2020, geophysical research was conducted by Saricon B.V., using EMI and MAG techniques leading to spectacular results. It revealed a square castle structure of 45 x 45 m found east of the ground plan of the structure published by Renaud in 1960. This structure is completely unique for the Low Countries. It may have been built as walled encampment or was perhaps
inspired by the square castles of the Île de France several decades before, dating back to the age of William II. This dating for the first half of the thirteenth century is based
on an observation from 2000-2001 when pottery from this
era came to light on the terrain. Next to the main castle a system of canals was found that was even more expansive than previously thought, as well as an outer bailey with several structures, a mill and extensive defensive structures with, so far, only the second possible barbican found in a Dutch castle. A ‘tower within a tower’ was found, something never seen before in the Netherlands. Just outside the defensive structures
of the castle complex an enormous tithe barn was discovered. Owing to the geophysical research and its unique results, a whole castle complex and its surroundings of functional building was re-discovered, a sight hardly ever seen by castle researchers in the Netherlands. (with thanks to Paulette Kooijman)

Research paper thumbnail of Kasteel Marquette, voormalige waterburcht.

De archeologische kroniek van Noord-Holland 2020, 2021

Geofysisch onderzoek naar de in 1802 gesloopte 13e-eeuwse ronde waterburcht. Geophysical researc... more Geofysisch onderzoek naar de in 1802 gesloopte 13e-eeuwse ronde waterburcht.

Geophysical research into the 13th-century circular moated castle, which was demolished in 1802.

Research paper thumbnail of Heemskerk | Kasteelterrein Oud Haerlem

De archeologische kroniek van Noord-Holland 2020, 2021

Geofysisch onderzoek naar het kasteel Oud Haerlem, de eerste interpretatie van het onderzoek. Het... more Geofysisch onderzoek naar het kasteel Oud Haerlem, de eerste interpretatie van het onderzoek. Het kasteel blijkt groter te zijn dan gedacht. Bijzonder en zeldzaam zijn de belegeringswerken (on-nederlands) rondom de kern en de bijgebouwen. Op de voorhof is een torenmolen aangetroffen en opmerkelijk genoeg een mogelijke tienschuur.

Geophysical survey of the castle Oud Haerlem, the first interpretation of the survey. The castle turns out to be bigger than expected. Special and rare are the siege works (un-Dutch) around the core and the outbuildings. A tower mill has been found in the forecourt and, remarkably enough, a possible ten barn.

Research paper thumbnail of Large-scale migration into Britain during the Middle to Late Bronze Age

Nature, 2021

Present-day people from England and Wales harbour more ancestry derived from Early European Farme... more Present-day people from England and Wales harbour more ancestry derived from Early European Farmers (EEF) than people of the Early Bronze Age1. To understand this, we generated genome-wide data from 793 individuals, increasing data from the Middle to Late Bronze and Iron Age in Britain by 12-fold, and Western and Central Europe by 3.5-fold. Between 1000 and 875 BC, EEF ancestry increased in southern Britain (England and Wales) but not northern Britain (Scotland) due to incorporation of migrants who arrived at this time and over previous centuries, and who were genetically most similar to ancient individuals from France. These migrants contributed about half the ancestry of Iron Age people of England and Wales, thereby creating a plausible vector for the spread of early Celtic languages into Britain. These patterns are part of a broader trend of EEF ancestry becoming more similar across central and western Europe in the Middle to Late Bronze Age, coincident with archaeological evidence of intensified cultural exchange2-6. There was comparatively less gene flow from continental Europe during the Iron Age, and Britain's independent genetic trajectory is also reflected in the rise of the allele conferring lactase persistence to ~50% by this time compared to ~7% in central Europe where it rose rapidly in frequency only a millennium later. This suggests that dairy products were used in qualitatively different ways in Britain and in central Europe over this period.

Research paper thumbnail of Nieuw onderzoek op oud terrein: Geofysisch onderzoek naar abij Egmond-Binnen

Geestgronden, Oct 1, 2019

Research paper thumbnail of N. Pattrson et al. 2021 - Large-scale migration into Britain during the Middle to Late Bronze Age

by Martina Blečić Kavur, Viktória Kiss, Domagoj Perkić, Anita Kozubová, Ian Armit, Morana Causevic Bully, Matija Črešnar, Manuel Fernández-Götz, Károly Tankó, JOSIP BURMAZ, Joško Zaninović, Katalin Almássy, Marko Dizdar, Gábor Ilon, Jean Roefstra, Michelle Gamble, and Jos Kleijne

Nature, 2021

By: Nick Patterson, Michael Isakov, Thomas Booth, Lindsey Büster, Claire-Elise Fischer, Iñigo Ola... more By: Nick Patterson, Michael Isakov, Thomas Booth, Lindsey Büster, Claire-Elise Fischer, Iñigo Olalde, Harald Ringbauer, Ali Akbari, Olivia Cheronet, Madeleine Bleasdale, Nicole Adamski, Eveline Altena, Rebecca Bernardos, Selina Brace, Nasreen Broomandkhoshbacht, Kimberly Callan, Francesca Candilio, Brendan Culleton, Elizabeth Curtis, Lea Demetz, Kellie Sara Duffett Carlson, Daniel M. Fernandes, M. George B. Foody, Suzanne Freilich, Helen Goodchild, Aisling Kearns, Ann Marie Lawson, Iosif Lazaridis, Matthew Mah, Swapan Mallick, Kirsten Mandl, Adam Micco, Megan Michel, Guillermo Bravo Morante, Jonas Oppenheimer, Kadir Toykan Özdoğan, Lijun Qiu, Constanze Schattke, Kristin Stewardson, J. Noah Workman, Fatma Zalzala, Zhao Zhang, Bibiana Agustí, Tim Allen, Katalin Almássy, Luc Amkreutz, Abigail Ash, Christèle Baillif-Ducros, Alistair Barclay, László Bartosiewicz, Katherine Baxter, Zsolt Bernert, Jan Blažek, Mario Bodružić, Philippe Boissinot, Clive Bonsall, Pippa Bradley, Marcus Brittain, Alison Brookes, Fraser Brown, Lisa Brown, Richard Brunning, Chelsea Budd, Josip Burmaz, Sylvain Canet, Silvia Carnicero-Cáceres, Morana Čaušević-Bully, Andrew Chamberlain, Sébastien Chauvin, Sharon Clough, Natalija Čondić, Alfredo Coppa, Oliver Craig, Matija Črešnar, Vicki Cummings, Szabolcs Czifra, Alžběta Danielisová, Robin Daniels, Alex Davies, Philip de Jersey, Jody Deacon, Csilla Deminger, Peter W. Ditchfield, Marko Dizdar, Miroslav Dobeš, Miluše Dobisíková, László Domboróczki, Gail Drinkall, Ana Đukić, Ceiridwen J. Edwards, Michal Ernée, Christopher Evans, Jane Evans, Manuel Fernández-Götz, Slavica Filipović, Andrew Fitzpatrick, Harry Fokkens, Chris Fowler, Allison Fox, Zsolt Gallina, Michelle Gamble, Manuel R. González Morales, Borja González-Rabanal, Adrian Green, Katalin Gyenesei, Diederick Habermehl, Tamás Hajdu, Derek Hamilton, James Harris, Chris Hayden, Joep Hendriks, Bénédicte Hernu, Gill Hey, Milan Horňák, Gábor Ilon, Eszter Istvánovits, Andy M. Jones, Martina Blečić Kavur, Kevin Kazek, Robert A. Kenyon, Amal Khreisheh, Viktória Kiss, Jos Kleijne, Mark Knight, Lisette M. Kootker, Péter F. Kovács, Anita Kozubová, Gabriella Kulcsár, Valéria Kulcsár, Christophe Le Pennec, Michael Legge, Matt Leivers, Louise Loe, Olalla López-Costas, Tom Lord, Dženi Los, James Lyall, Ana B. Marín-Arroyo, Philip Mason, Damir Matošević, Andy Maxted, Lauren McIntyre, Jacqueline McKinley, Kathleen McSweeney, Bernard Meijlink, Balázs G. Mende, Marko Menđušić, Milan Metlička, Sophie Meyer, Kristina Mihovilić, Lidija Milasinovic, Steve Minnitt, Joanna Moore, Geoff Morley, Graham Mullan, Margaréta Musilová, Benjamin Neil, Rebecca Nicholls, Mario Novak, Maria Pala, Martin Papworth, Cécile Paresys, Ricky Patten, Domagoj Perkić, Krisztina Pesti, Alba Petit, Katarína Petriščáková, Coline Pichon, Catriona Pickard, Zoltán Pilling, T. Douglas Price, Siniša Radović, Rebecca Redfern, Branislav Resutík, Daniel T. Rhodes, Martin B. Richards, Amy Roberts, Jean Roefstra, Pavel Sankot, Alena Šefčáková, Alison Sheridan, Sabine Skae, Miroslava Šmolíková, Krisztina Somogyi, Ágnes Somogyvári, Mark Stephens, Géza Szabó, Anna Szécsényi-Nagy, Tamás Szeniczey, Jonathan Tabor, Károly Tankó, Clenis Tavarez Maria, Rachel Terry, Biba Teržan, Maria Teschler-Nicola, Jesús F. Torres-Martínez, Julien Trapp, Ross Turle, Ferenc Ujvári, Menno van der Heiden, Petr Veleminsky, Barbara Veselka, Zdeněk Vytlačil, Clive Waddington, Paula Ware, Paul Wilkinson, Linda Wilson, Rob Wiseman, Eilidh Young, Joško Zaninović, Andrej Žitňan, Carles Lalueza-Fox, Peter de Knijff, Ian Barnes, Peter Halkon, Mark G. Thomas, Douglas J. Kennett, Barry Cunliffe, Malcolm Lillie, Nadin Rohland, Ron Pinhasi, Ian Armit & David Reich

Present-day people from England and Wales harbour more ancestry derived from Early European Farmers (EEF) than people of the Early Bronze Age1. To understand this, we generated genome-wide data from 793 individuals, increasing data from the Middle to Late Bronze and Iron Age in Britain by 12-fold, and Western and Central Europe by 3.5-fold. Between 1000 and 875 BC, EEF ancestry increased in southern Britain (England and Wales) but not northern Britain (Scotland) due to incorporation of migrants who arrived at this time and over previous centuries, and who were genetically most similar to ancient individuals from France. These migrants contributed about half the ancestry of Iron Age people of England and Wales, thereby creating a plausible vector for the spread of early Celtic languages into Britain. These patterns are part of a broader trend of EEF ancestry becoming more similar across central and western Europe in the Middle to Late Bronze Age, coincident with archaeological evidence of intensified cultural exchange2–6. There was comparatively less gene flow from continental Europe during the Iron Age, and Britain’s independent genetic trajectory is also reflected in the rise of the allele conferring lactase persistence to ~50% by this time compared to ~7% in central Europe where it rose rapidly in frequency only a millennium later. This suggests that dairy products were used in qualitatively different ways in Britain and in central Europe over this period.

Research paper thumbnail of Large-scale migration into Britain during the Middle to Late Bronze Age

Present-day people from England and Wales harbour more ancestry derived from Early European Farme... more Present-day people from England and Wales harbour more ancestry derived from Early European Farmers (EEF) than people of the Early Bronze Age¹. To understand this, we generated genome-wide data from 793 individuals, increasing data from the Middle to Late Bronze and Iron Age in Britain by 12-fold, and Western and Central Europe by 3.5-fold. Between 1000 and 875 bc, EEF ancestry increased in southern Britain (England and Wales) but not northern Britain (Scotland) due to incorporation of migrants who arrived at this time and over previous centuries, and who were genetically most similar to ancient individuals from France. These migrants contributed about half the ancestry of Iron Age people of England and Wales, thereby creating a plausible vector for the spread of early Celtic languages into Britain. These patterns are part of a broader trend of EEF ancestry becoming more similar across central and western Europe in the Middle to Late Bronze Age, coincident with archaeological eviden...

Research paper thumbnail of Geofysisch onderzoek abdij Egmond-Binnen

Research paper thumbnail of Bergen - Egmond-Binnen | Abdij

Archeologische Kroniek Noord-Holland over 2019, 30-38., 2020

Geofysisch onderzoek van het voormalige abdijterrein van Egmond te Egmond-Binnen door Saricon BV.... more Geofysisch onderzoek van het voormalige abdijterrein van Egmond te Egmond-Binnen door Saricon BV.

Geophysical survey of the former abbey site of Egmond in Egmond-Binnen by Saricon BV.

Research paper thumbnail of Geofysisch proefonderzoek van kasteelterrein Oud Haerlem te Heemskerk

Archeologische Kroniek Noord-Holland over 2019, 209-212., 2020

Geofysisch proefonderzoek van kasteelterrein Oud Haerlem (1248-1351) te Heemskerk door Saricon BV... more Geofysisch proefonderzoek van kasteelterrein Oud Haerlem (1248-1351) te Heemskerk door Saricon BV.

Geophysical test study of Oud Haerlem castle grounds (1248-1351) in Heemskerk by Saricon BV.

Research paper thumbnail of Kastelenonderzoeker Jaap Renaud (1911-2007) in Noord-Holland.

De archeologische kroniek van Noord-Holland 2019 (2020) p. 190-208., 2020

Beschrijving van het middeleeuwse kastelenonderzoek door prof.dr. Renaud tussen 1930-1980 in de p... more Beschrijving van het middeleeuwse kastelenonderzoek door prof.dr. Renaud tussen 1930-1980 in de provincie Noord-Holland door twee van zijn studenten.

Description of medieval castle research by prof.dr. Renaud between 1930-1980 in the province of Noord-Holland by two of his students.

Research paper thumbnail of Hernieuwd onderzoek naar kasteelterrein Oud Haerlem

Kennemer Verleden, Historisch Genootschap Midden-Kennemerland, 109-116., 2020

Geofysisch onderzoek op het kasteelterein Oud Haerlem te Heemskerk. Hierbij werden de resten gevo... more Geofysisch onderzoek op het kasteelterein Oud Haerlem te Heemskerk. Hierbij werden de resten gevonden van onbekende bouwonderdelen die niet onderzocht waren in 1943 en 1960 door prof.dr. J.G.N. Renaud. Spectaculair is de vondst van een vierkant ommuurd legerkamp, de grootste en vroegste in Nederland en mogelijk Europa. Het kasteel werd gebouwd tussen 1248 en 1250 en verwoest in 1351 na een langdurig beleg.

Geophysical research on the Oud Haerlem castle grounds in Heemskerk. The remains of unknown building components were found that had not been investigated in 1943 and 1960 by Prof.dr. JGN Renaud.
A spectacular find of a square walled army camp, the largest and earliest in the Netherlands and possibly Europe. The castle was built between 1248 and 1250 and destroyed in 1351 after a long siege.

Research paper thumbnail of Villers-le-Temple- a quick scan into the archaeology and building history.

SHA Templar studies number 1 , 2020

Archaeological and architectural history quick scan of vaults and corridors under the existing co... more Archaeological and architectural history quick scan of vaults and corridors under the existing commandery of the Knights Templar, later Order of Saint John. There are indications from archaeological finds, among other things, that the complex already existed in the 12th century.

Research paper thumbnail of Kastelenonderzoeker Jaap Renaud (1911-2007) in Noord-Holland (extra lange versie

Kennemer Verleden, Historisch Genootschap Midden-Kennemerland, 2021

O p 25 maart 2007 overleed Jaap renaud op de leeftiJd van 96 Jaar. Hij was kasteeldeskundige bij ... more O p 25 maart 2007 overleed Jaap renaud op de leeftiJd van 96 Jaar. Hij was kasteeldeskundige bij uitstek, historicus, bouwhistoricus, archeoloog, docent, voor een deel autodidact, breed georiënteerd en tot op hoge leeftijd betrokken bij de ontwikkelingen in de kasteelarcheologie. Als een der eersten in Nederland was hij ervan overtuigd dat het onderzoek naar het fenomeen 'middeleeuws kasteel' breed moest worden aangepakt. Hij was van mening dat het kasteel onder meer als historisch, archeologisch, typologisch en literair object moest worden bestudeerd om zo het object in zijn totaliteit te kunnen begrijpen. Deze gedachtegang was de basis voor de integrale en interdisciplinaire aanpak van het kastelenonderzoek, zoals we dat tegenwoordig kennen en nastreven.

Research paper thumbnail of Heemskerk | Kasteel Assumburg

De archeologische kroniek van Noord-Holland 2021, 2022

Onderzoek naar de voorganger van kasteel Assumburg te Heemskerk

Research paper thumbnail of Velsen – Santpoort-Zuid | Ruïne van Brederode

De archeologische kroniek van Noord-Holland 2021, 2022

Research paper thumbnail of Bloemendaal | Terrein voormalig huis Aelbertsberg

De archeologische kroniek van Noord-Holland 2021, 2022

Research paper thumbnail of Voormalige voorburcht van kasteel Oosterwijk

De archeologische kroniek van Noord-Holland 2021, 2022

Geofysisch onderzoek van een voormalige 13e eeuwse voorburcht kasteel Oosterwijk, Beverwijk.

Research paper thumbnail of Geopgysical survey abbey Egmond-Binnen

Research paper thumbnail of Geofysisch Proefonderzoek Kasteelterrein Oud Haerlem Te Heemskerk

De archeologische kroniek van Noord-Holland 2019, 2020

Research paper thumbnail of Kasteel Oud Haerlem te Heemskerk. Een kort bestaan maar een lang verhaal (with summary in English)

‘Die hofstat daer dat huys op plach te staan’ Recent onderzoek naar kastelen en buitenplaatsen, eindredactie: T. Hermans & R. Gruben, Stichting Kastelenstudies Nederland ism SPA uitgevers, 2022

Jean Roefstra Oud Haerlem Castle at Heemskerk A short existence but a long story The origins ... more Jean Roefstra
Oud Haerlem Castle at Heemskerk
A short existence but a long story
The origins of Oud Haerlem Castle can apparently be connected directly to a charter by the count of Holland William II (1234-1256) and king of the Holy Roman Empire (1247- 1256). By that charter, dated 16 October 1248, William and his brother Florens transfer their own property the ‘Hof te Heemskerk’ with accessories to the knights Simon II of Haarlem and Wouter of Egmond through sale. Simon II of Haarlem leaves his castle in the town of Haarlem in 1249 to live in Heemskerk as his main residence instead. In view of the short period between 1248 and 1249, the question arises whether or not the castle was built beforehand. In 1351, the castle was
destroyed completely and its inhabitants killed during an internal war. The Netherland’s most renowned castle researcher Prof Dr J.G.N. Renaud explored a small part of the castle terrain in 1943 and 1960-1965. In the December 1960 issue of the staff magazine of the company Hoogovens, Renaud published a plan of the irregularly squared supposed outer bailey with small towers, a sally port (?) and a projecting entrance structure, an oblique tower. Renaud dated this complex between
c. 1250 and 1351. Typologically speaking this plan is largely identical to that of Grunsfoort Castle in Gelderland. For Oud Haerlem Castle a remarkable find was a bronze treasure trove of 15 objects, until today the largest late medieval
bronze treasure ever found in the Netherlands. Further archaeological research has not been undertaken. A study of Renaud’s materials after his death in 2007 confirmed his dating, but questions rose about the interpretation of the alleged outer bailey. Research by excavation however has become impossible due to the area’s designation as an Archeological National Monument in 1975. In 2020, geophysical research was conducted by Saricon B.V., using EMI and MAG techniques leading to spectacular results. It revealed a square castle structure of 45 x 45 m found east of the ground plan of the structure published by Renaud in 1960. This structure is completely unique for the Low Countries. It may have been built as walled encampment or was perhaps
inspired by the square castles of the Île de France several decades before, dating back to the age of William II. This dating for the first half of the thirteenth century is based
on an observation from 2000-2001 when pottery from this
era came to light on the terrain. Next to the main castle a system of canals was found that was even more expansive than previously thought, as well as an outer bailey with several structures, a mill and extensive defensive structures with, so far, only the second possible barbican found in a Dutch castle. A ‘tower within a tower’ was found, something never seen before in the Netherlands. Just outside the defensive structures
of the castle complex an enormous tithe barn was discovered. Owing to the geophysical research and its unique results, a whole castle complex and its surroundings of functional building was re-discovered, a sight hardly ever seen by castle researchers in the Netherlands. (with thanks to Paulette Kooijman)

Research paper thumbnail of Kasteel Marquette, voormalige waterburcht.

De archeologische kroniek van Noord-Holland 2020, 2021

Geofysisch onderzoek naar de in 1802 gesloopte 13e-eeuwse ronde waterburcht. Geophysical researc... more Geofysisch onderzoek naar de in 1802 gesloopte 13e-eeuwse ronde waterburcht.

Geophysical research into the 13th-century circular moated castle, which was demolished in 1802.

Research paper thumbnail of Heemskerk | Kasteelterrein Oud Haerlem

De archeologische kroniek van Noord-Holland 2020, 2021

Geofysisch onderzoek naar het kasteel Oud Haerlem, de eerste interpretatie van het onderzoek. Het... more Geofysisch onderzoek naar het kasteel Oud Haerlem, de eerste interpretatie van het onderzoek. Het kasteel blijkt groter te zijn dan gedacht. Bijzonder en zeldzaam zijn de belegeringswerken (on-nederlands) rondom de kern en de bijgebouwen. Op de voorhof is een torenmolen aangetroffen en opmerkelijk genoeg een mogelijke tienschuur.

Geophysical survey of the castle Oud Haerlem, the first interpretation of the survey. The castle turns out to be bigger than expected. Special and rare are the siege works (un-Dutch) around the core and the outbuildings. A tower mill has been found in the forecourt and, remarkably enough, a possible ten barn.

Research paper thumbnail of Large-scale migration into Britain during the Middle to Late Bronze Age

Nature, 2021

Present-day people from England and Wales harbour more ancestry derived from Early European Farme... more Present-day people from England and Wales harbour more ancestry derived from Early European Farmers (EEF) than people of the Early Bronze Age1. To understand this, we generated genome-wide data from 793 individuals, increasing data from the Middle to Late Bronze and Iron Age in Britain by 12-fold, and Western and Central Europe by 3.5-fold. Between 1000 and 875 BC, EEF ancestry increased in southern Britain (England and Wales) but not northern Britain (Scotland) due to incorporation of migrants who arrived at this time and over previous centuries, and who were genetically most similar to ancient individuals from France. These migrants contributed about half the ancestry of Iron Age people of England and Wales, thereby creating a plausible vector for the spread of early Celtic languages into Britain. These patterns are part of a broader trend of EEF ancestry becoming more similar across central and western Europe in the Middle to Late Bronze Age, coincident with archaeological evidence of intensified cultural exchange2-6. There was comparatively less gene flow from continental Europe during the Iron Age, and Britain's independent genetic trajectory is also reflected in the rise of the allele conferring lactase persistence to ~50% by this time compared to ~7% in central Europe where it rose rapidly in frequency only a millennium later. This suggests that dairy products were used in qualitatively different ways in Britain and in central Europe over this period.

Research paper thumbnail of Nieuw onderzoek op oud terrein: Geofysisch onderzoek naar abij Egmond-Binnen

Geestgronden, Oct 1, 2019

Research paper thumbnail of N. Pattrson et al. 2021 - Large-scale migration into Britain during the Middle to Late Bronze Age

by Martina Blečić Kavur, Viktória Kiss, Domagoj Perkić, Anita Kozubová, Ian Armit, Morana Causevic Bully, Matija Črešnar, Manuel Fernández-Götz, Károly Tankó, JOSIP BURMAZ, Joško Zaninović, Katalin Almássy, Marko Dizdar, Gábor Ilon, Jean Roefstra, Michelle Gamble, and Jos Kleijne

Nature, 2021

By: Nick Patterson, Michael Isakov, Thomas Booth, Lindsey Büster, Claire-Elise Fischer, Iñigo Ola... more By: Nick Patterson, Michael Isakov, Thomas Booth, Lindsey Büster, Claire-Elise Fischer, Iñigo Olalde, Harald Ringbauer, Ali Akbari, Olivia Cheronet, Madeleine Bleasdale, Nicole Adamski, Eveline Altena, Rebecca Bernardos, Selina Brace, Nasreen Broomandkhoshbacht, Kimberly Callan, Francesca Candilio, Brendan Culleton, Elizabeth Curtis, Lea Demetz, Kellie Sara Duffett Carlson, Daniel M. Fernandes, M. George B. Foody, Suzanne Freilich, Helen Goodchild, Aisling Kearns, Ann Marie Lawson, Iosif Lazaridis, Matthew Mah, Swapan Mallick, Kirsten Mandl, Adam Micco, Megan Michel, Guillermo Bravo Morante, Jonas Oppenheimer, Kadir Toykan Özdoğan, Lijun Qiu, Constanze Schattke, Kristin Stewardson, J. Noah Workman, Fatma Zalzala, Zhao Zhang, Bibiana Agustí, Tim Allen, Katalin Almássy, Luc Amkreutz, Abigail Ash, Christèle Baillif-Ducros, Alistair Barclay, László Bartosiewicz, Katherine Baxter, Zsolt Bernert, Jan Blažek, Mario Bodružić, Philippe Boissinot, Clive Bonsall, Pippa Bradley, Marcus Brittain, Alison Brookes, Fraser Brown, Lisa Brown, Richard Brunning, Chelsea Budd, Josip Burmaz, Sylvain Canet, Silvia Carnicero-Cáceres, Morana Čaušević-Bully, Andrew Chamberlain, Sébastien Chauvin, Sharon Clough, Natalija Čondić, Alfredo Coppa, Oliver Craig, Matija Črešnar, Vicki Cummings, Szabolcs Czifra, Alžběta Danielisová, Robin Daniels, Alex Davies, Philip de Jersey, Jody Deacon, Csilla Deminger, Peter W. Ditchfield, Marko Dizdar, Miroslav Dobeš, Miluše Dobisíková, László Domboróczki, Gail Drinkall, Ana Đukić, Ceiridwen J. Edwards, Michal Ernée, Christopher Evans, Jane Evans, Manuel Fernández-Götz, Slavica Filipović, Andrew Fitzpatrick, Harry Fokkens, Chris Fowler, Allison Fox, Zsolt Gallina, Michelle Gamble, Manuel R. González Morales, Borja González-Rabanal, Adrian Green, Katalin Gyenesei, Diederick Habermehl, Tamás Hajdu, Derek Hamilton, James Harris, Chris Hayden, Joep Hendriks, Bénédicte Hernu, Gill Hey, Milan Horňák, Gábor Ilon, Eszter Istvánovits, Andy M. Jones, Martina Blečić Kavur, Kevin Kazek, Robert A. Kenyon, Amal Khreisheh, Viktória Kiss, Jos Kleijne, Mark Knight, Lisette M. Kootker, Péter F. Kovács, Anita Kozubová, Gabriella Kulcsár, Valéria Kulcsár, Christophe Le Pennec, Michael Legge, Matt Leivers, Louise Loe, Olalla López-Costas, Tom Lord, Dženi Los, James Lyall, Ana B. Marín-Arroyo, Philip Mason, Damir Matošević, Andy Maxted, Lauren McIntyre, Jacqueline McKinley, Kathleen McSweeney, Bernard Meijlink, Balázs G. Mende, Marko Menđušić, Milan Metlička, Sophie Meyer, Kristina Mihovilić, Lidija Milasinovic, Steve Minnitt, Joanna Moore, Geoff Morley, Graham Mullan, Margaréta Musilová, Benjamin Neil, Rebecca Nicholls, Mario Novak, Maria Pala, Martin Papworth, Cécile Paresys, Ricky Patten, Domagoj Perkić, Krisztina Pesti, Alba Petit, Katarína Petriščáková, Coline Pichon, Catriona Pickard, Zoltán Pilling, T. Douglas Price, Siniša Radović, Rebecca Redfern, Branislav Resutík, Daniel T. Rhodes, Martin B. Richards, Amy Roberts, Jean Roefstra, Pavel Sankot, Alena Šefčáková, Alison Sheridan, Sabine Skae, Miroslava Šmolíková, Krisztina Somogyi, Ágnes Somogyvári, Mark Stephens, Géza Szabó, Anna Szécsényi-Nagy, Tamás Szeniczey, Jonathan Tabor, Károly Tankó, Clenis Tavarez Maria, Rachel Terry, Biba Teržan, Maria Teschler-Nicola, Jesús F. Torres-Martínez, Julien Trapp, Ross Turle, Ferenc Ujvári, Menno van der Heiden, Petr Veleminsky, Barbara Veselka, Zdeněk Vytlačil, Clive Waddington, Paula Ware, Paul Wilkinson, Linda Wilson, Rob Wiseman, Eilidh Young, Joško Zaninović, Andrej Žitňan, Carles Lalueza-Fox, Peter de Knijff, Ian Barnes, Peter Halkon, Mark G. Thomas, Douglas J. Kennett, Barry Cunliffe, Malcolm Lillie, Nadin Rohland, Ron Pinhasi, Ian Armit & David Reich

Present-day people from England and Wales harbour more ancestry derived from Early European Farmers (EEF) than people of the Early Bronze Age1. To understand this, we generated genome-wide data from 793 individuals, increasing data from the Middle to Late Bronze and Iron Age in Britain by 12-fold, and Western and Central Europe by 3.5-fold. Between 1000 and 875 BC, EEF ancestry increased in southern Britain (England and Wales) but not northern Britain (Scotland) due to incorporation of migrants who arrived at this time and over previous centuries, and who were genetically most similar to ancient individuals from France. These migrants contributed about half the ancestry of Iron Age people of England and Wales, thereby creating a plausible vector for the spread of early Celtic languages into Britain. These patterns are part of a broader trend of EEF ancestry becoming more similar across central and western Europe in the Middle to Late Bronze Age, coincident with archaeological evidence of intensified cultural exchange2–6. There was comparatively less gene flow from continental Europe during the Iron Age, and Britain’s independent genetic trajectory is also reflected in the rise of the allele conferring lactase persistence to ~50% by this time compared to ~7% in central Europe where it rose rapidly in frequency only a millennium later. This suggests that dairy products were used in qualitatively different ways in Britain and in central Europe over this period.

Research paper thumbnail of Large-scale migration into Britain during the Middle to Late Bronze Age

Present-day people from England and Wales harbour more ancestry derived from Early European Farme... more Present-day people from England and Wales harbour more ancestry derived from Early European Farmers (EEF) than people of the Early Bronze Age¹. To understand this, we generated genome-wide data from 793 individuals, increasing data from the Middle to Late Bronze and Iron Age in Britain by 12-fold, and Western and Central Europe by 3.5-fold. Between 1000 and 875 bc, EEF ancestry increased in southern Britain (England and Wales) but not northern Britain (Scotland) due to incorporation of migrants who arrived at this time and over previous centuries, and who were genetically most similar to ancient individuals from France. These migrants contributed about half the ancestry of Iron Age people of England and Wales, thereby creating a plausible vector for the spread of early Celtic languages into Britain. These patterns are part of a broader trend of EEF ancestry becoming more similar across central and western Europe in the Middle to Late Bronze Age, coincident with archaeological eviden...

Research paper thumbnail of Geofysisch onderzoek abdij Egmond-Binnen

Research paper thumbnail of Bergen - Egmond-Binnen | Abdij

Archeologische Kroniek Noord-Holland over 2019, 30-38., 2020

Geofysisch onderzoek van het voormalige abdijterrein van Egmond te Egmond-Binnen door Saricon BV.... more Geofysisch onderzoek van het voormalige abdijterrein van Egmond te Egmond-Binnen door Saricon BV.

Geophysical survey of the former abbey site of Egmond in Egmond-Binnen by Saricon BV.

Research paper thumbnail of Geofysisch proefonderzoek van kasteelterrein Oud Haerlem te Heemskerk

Archeologische Kroniek Noord-Holland over 2019, 209-212., 2020

Geofysisch proefonderzoek van kasteelterrein Oud Haerlem (1248-1351) te Heemskerk door Saricon BV... more Geofysisch proefonderzoek van kasteelterrein Oud Haerlem (1248-1351) te Heemskerk door Saricon BV.

Geophysical test study of Oud Haerlem castle grounds (1248-1351) in Heemskerk by Saricon BV.

Research paper thumbnail of Kastelenonderzoeker Jaap Renaud (1911-2007) in Noord-Holland.

De archeologische kroniek van Noord-Holland 2019 (2020) p. 190-208., 2020

Beschrijving van het middeleeuwse kastelenonderzoek door prof.dr. Renaud tussen 1930-1980 in de p... more Beschrijving van het middeleeuwse kastelenonderzoek door prof.dr. Renaud tussen 1930-1980 in de provincie Noord-Holland door twee van zijn studenten.

Description of medieval castle research by prof.dr. Renaud between 1930-1980 in the province of Noord-Holland by two of his students.

Research paper thumbnail of Hernieuwd onderzoek naar kasteelterrein Oud Haerlem

Kennemer Verleden, Historisch Genootschap Midden-Kennemerland, 109-116., 2020

Geofysisch onderzoek op het kasteelterein Oud Haerlem te Heemskerk. Hierbij werden de resten gevo... more Geofysisch onderzoek op het kasteelterein Oud Haerlem te Heemskerk. Hierbij werden de resten gevonden van onbekende bouwonderdelen die niet onderzocht waren in 1943 en 1960 door prof.dr. J.G.N. Renaud. Spectaculair is de vondst van een vierkant ommuurd legerkamp, de grootste en vroegste in Nederland en mogelijk Europa. Het kasteel werd gebouwd tussen 1248 en 1250 en verwoest in 1351 na een langdurig beleg.

Geophysical research on the Oud Haerlem castle grounds in Heemskerk. The remains of unknown building components were found that had not been investigated in 1943 and 1960 by Prof.dr. JGN Renaud.
A spectacular find of a square walled army camp, the largest and earliest in the Netherlands and possibly Europe. The castle was built between 1248 and 1250 and destroyed in 1351 after a long siege.

Research paper thumbnail of J. Roefstra, 2018: Oud Haarlem opgegraven, in: Begraven verleden. Hoven en kastelen in Kennemerland, door E.H.P. Cordfunke (Met een bijdrage van J. Roefstra) , 100-114.

Elaboration of the archaeological excavation 13th century castle Oud Haerlem in Heemskerk (1943, ... more Elaboration of the archaeological excavation 13th century castle Oud Haerlem in Heemskerk (1943, 1960-1965)

Research paper thumbnail of 2016: Aardewerk afkomstig van de terreinen van de tempeliers- en hospitaalorde te Zaamslag. QuickScan Collectie Schelpenmuseum (S.H.A. rapport 1) J.Roefstra & M. Tuin (Pottery from the areas of the Knights Templar and hospitaller order. Quick Scan Collection Shell museum Zaamslag)

Research on the pottery finds made on both site Tempelhof as on the Hospital site shows habitatio... more Research on the pottery finds made on both site Tempelhof as on the Hospital site shows habitation of both locations at Zaamslag (Pays Bas).
For this research were determined in total 6,282 fragments pottery by J. Roefstra.
For the terrain Tempelhof (Knights Templar), occupation took place from the middle of the twelfth century until the end of the 13th or the beginning of the fourteenth century. For the hospital site, there is occupation took place from the beginning of the 14th century until the end of 16th century.

Research paper thumbnail of Kasteel Oud Haerlem, Stichting Historische Archeologie kastelenreeks deel 3.

Summary and preliminary results of the excavations at kasteel Oud Haerlem in Heemskerk (Pays Bas)... more Summary and preliminary results of the excavations at kasteel Oud Haerlem in Heemskerk (Pays Bas). With habitation history. Kasteel Oud Haerlem was built about 1250 and devastated and never built in 1351.

Research paper thumbnail of  ‘De vondsten’, in: E.H.P. Cordfunke (red.), De Abdij van Egmond: archeologie en duizend jaar geschiedenis, met bijdragen van E. den Hartog, G.R. Maat en J. Roefstra, Zutphen, 171-188.

The finds from the excavations at the Abbey of Egmond Abbey after the excavations from 1947 exami... more The finds from the excavations at the Abbey of Egmond Abbey after the excavations from 1947 examined in the project of Roefstra and Cordfunke (2006-2008) at the Abbey of Egmond.

Research paper thumbnail of Vloeren en vloertegels in de voormalige abdijkerk van Egmond, in: E.H.P. Cordfunke (red.), De Abdij van Egmond: archeologie en duizend jaar geschiedenis, met bijdragen van E. den Hartog, G.R. Maat en J. Roefstra,Zutphen, 130-143.

Research and reconstruction of excavation data on ornate floor tiles and floors from the former m... more Research and reconstruction of excavation data on ornate floor tiles and floors from the former medieval Abbey of Egmond.

Research paper thumbnail of Archeologische begeleiding tunneltracé Broekpolder – Oud Haerlem te Heemskerk, HOLLANDIA, cultuurhistorisch onderzoek en archeologie, Hollandia reeks nummer 18, 22 pp.

Archaeological tunnel route guidance along and by the archaeological monument kasteel Oud Haerlem... more Archaeological tunnel route guidance along and by the archaeological monument kasteel Oud Haerlem-Broekpolder

Research paper thumbnail of 1992: Klein Poelgeest, een riddermatige hofstede in Rijnland, Serie Nederlandse kastelen, nieuwe reeks deel 26, Nederlandse Kastelen Stichting, Wijk bij Duurstede.

Search for a 14-15th century fortified House that was demolished in the early 19th century. Known... more Search for a 14-15th century fortified House that was demolished in the early 19th century. Known by the assassination on Aleid van Poelgeest in 1392, mistress of the Earl of Holland Albrecht of Bavaria.