"Voi avete un cor fedele", K. 217, is a concert aria by Wolfgang Amadeus Mozart for solo soprano and orchestra, composed in Salzburg, dated 26 October 1775. Written around the time of the composition of Mozart's five violin concertos. In this aria, the character Dorinda contemplates a new romantic partner. A travelling Italian opera company visited Salzburg, and asked Mozart to write an insertion aria for the opera Le nozze di Dorinda, an opera buffa by the Italian composer Baldassare Galuppi. The text originated by the dramatist Carlo Goldoni, but it is unknown who adapted this aria text for Mozart. The scholar Stanley Sadie noted the aria is “substantial with ironic overtones, set in alternating slow and fast sections, shows a remarkable advance in comic aptitude in its gestures and its timing as compared with anything in La finta giardiniera", which was completed by Mozart a few months earlier. The aria was published by Breitkopf & Härtel in 1882. It remains a popular concert piece, often performed and recorded. (en)
アリア『あなたは今忠実ね』（あなたはいま ちゅうじつね、伊：Voi avete un cor fedele ）K.217は、ヴォルフガング・アマデウス・モーツァルトが作曲したソプラノと管弦楽のためのアリア。『あなたの心は、今は私に』などとも訳される。 (ja)