Pietro Antonio Domenico Trapassi, better known by his pseudonym of Pietro Metastasio, was an Italian poet and librettist, considered the most important writer of opera seria libretti.

Adriano in Siria is an 18th-century Italian opera seria in 3 acts by the Czech composer Josef Mysliveček. It was composed to a libretto of the same name by the Italian poet Metastasio that was first p