own creation, Arsilda, regina di Ponto (RV 700), but the state censor blocked the performance. The main character, Arsilda, falls in love with another woman, Lisea, who is pretending to be a man. Vivaldi got the censor to accept the opera the following year, and it was a resounding success. During this period, the Pietà commissioned several liturgical works. The most important were two oratorios. Moyses Deus Pharaonis, (RV 643) is now lost. The second, Juditha triumphans (RV 644), celebrates the victory of the Republic of Venice against the Turks and the recapture of the island of Corfu. Composed in 1716, it is one of his sacred masterpieces. All eleven singing parts were performed by girls of the orphanage, both the female and male roles. Many of the arias include parts for solo instruments—recorders, oboes, violas d'amore, and mandolins—that showcased the range of talents of the girls. Also in 1716, Vivaldi wrote and produced two more operas, L'incoronazione di Dario (RV 719) and La costanza trionfante degli amori e degli odi (RV 706). The latter was so popular that it was performed two years later, re-edited and retitled Artabano re dei Parti (RV 701, now lost). It was also performed in Prague in 1732. In the years that followed, Vivaldi wrote several operas that were performed all over Italy. His progressive operatic style caused him some trouble with more conservative musicians such as Benedetto Marcello, a magistrate and amateur musician who wrote a pamphlet denouncing Vivaldi and his operas. The pamphlet, Il teatro alla moda, attacks the composer even as it does not mention him directly. The cover drawing shows a boat (the Sant'Angelo), on the left end of which stands a little angel wearing a priest's hat and playing the violin. The Marcello family claimed ownership of the Teatro Sant'Angelo, and a long legal battle had been fought with the management for its restitution, without success. The obscure text under the engraving mentions non-existent places and names: for example, ALDIVIVA is an anagram of "A. Vivaldi". In a letter written by Vivaldi to his patron Marchese Bentivoglio in 1737, he makes reference to his "94 operas". Only around 50 operas by Vivaldi have been discovered, and no other documentation of the remaining operas exists. Although Vivaldi may have been exaggerating, it is plausible that, in his dual role of composer and impresario, he may have either written or been