La stravanganza, op. 4, is a set of concertos written by Antonio Vivaldi in 1712–1713. The set was first published in 1716 and was dedicated to Venetian nobleman Signor Vettor Delfino. All of the concertos are scored for solo violin, strings, and basso continuo; however, some movements require extra soloists. What is perhaps most extraordinary about La stravaganza is Vivaldi's remarkable inventiveness within a defined framework of instrumental and harmonic forces.