Orlando furioso RV 819 (, Teatro San Angelo, Venice 1714) is a three-act opera surviving in manuscript in Antonio Vivaldi's personal library, only partly related to his better known Orlando furioso (RV 728) of 1727. It is a recomposition of an Orlando furioso written by Giovanni Alberto Ristori which had been very successfully staged by Vivaldi and his father's impresa in 1713, and whose music survives in a few fragments retained in the score of RV 819.Opera & Vivaldi Michael B. Collins, Elise Kuhl Kirk - 1984 "Beyond any doubt, Vivaldi took two arias — "Come l'onda" and "Anderò, chiamerò dal profondo" — from his 1714 work Orlando furioso and reused them in his 1727 opera. These texts are not found in Ristori's 1713 Orlando furioso," Therefore, Vivaldi's first cataloguer Peter Ryom did not assign the opera a RV number, but catalogued it as RV Anh. 84. The libretto was by Grazio Braccioli.
