Which set of concertos by Baroque composer Antonio Vivaldi was dedicated to Victor Delfin?
La stravaganza:  4, is a set of concertos written by Antonio Vivaldi in 1712–1713. La stravaganza:  The set was first published in 1716 and was dedicated to Venetian nobleman Victor Delfin. La stravaganza:  What is perhaps most extraordinary about "La stravaganza" is Vivaldi's remarkable inventiveness within a defined framework of instrumental and harmonic forces. Antonio Vivaldi: Antonio Lucio Vivaldi (] ; 4 March 1678 – 28 July 1741) was an Italian Baroque composer, virtuoso violinist, teacher and cleric.
"La stravaganza"