CAMBRIDGE — For its warmly received Boston debut at Sanders Theatre Saturday, the European chamber ensemble Il Giardino Armonico sent a musical love letter to a city with no shortage of admirers: Venice. Produced by the Boston Early Music Festival, the concert focused on composers of the 17th and 18th centuries, from familiar names like the titan Antonio Vivaldi to lesser-known Venetians such as Dario Castello, Tarquinio Merula, Giovanni Legrenzi, and Baldassare Galuppi.
The mellow acoustics proved ideal for the eight musicians and their intimate repertoire. Besides Giovanni Antonini, who directs the group and plays baroque flute, the ensemble includes two violins (Enrico Onofri and Marco Bianchi), viola (Stefano Barneschi), cello (Paolo Beschi), bass (Giancarlo De Frenza), lute (Luca Pianca), and harpsichord (Riccardo Doni). All play period instruments. Their stylish but casual onstage camaraderie bespeaks a long shared history and common purpose that made their performance an invigorating demonstration of the vitality of the early music movement.