No. 8, Concerto grosso in A minor for 2 violins, string orchestra and basso continuo RV 522 No. 8, Concerto grosso in A minor for 2 violins, string orchestra and basso continuo RV 522 Main opus "L'Estro Armonico" ("The Harmonic Inspiration"), 12 concertos for violins, string orchestra and Basso continuo op. 3