Adriano in Siria (Hadrian in Syria) is a libretto by Italian poet Metastasio first performed, with music by Antonio Caldara, in Vienna in 1732, and turned into an opera by at least 60 other composers during the next century. Metastasio based the background of the story on late Classical works by Cassius Dio (Book 19 of the Roman History) and Elio Sparziano (Vita Hadriani Caesaris). The aria Che fa il mio bene? also known as L'amante impaziente, sung by the character Emirena, was set to music by Ludwig van Beethoven in his Opus 82: 4 Arietten und ein Duett.