La stravaganza, 12 Violin Concertos, op. 4

La stravaganza [literally 'Extravagance'] (The Eccentricity), Op. 4, is a set of concertos written by Antonio Vivaldi in 1712–13. The set was first published in 1716 in Amsterdam and was dedicated to Venetian nobleman Vettor Delfino, who had been a violin student of Vivaldi's. All of the concertos are scored for solo violin, strings, and basso continuo; however, some movements require extra soloists (such as a second violin and/or cello solo).