Pietro Metastasio (3 January 1698 – 12 April 1782) was a poet from Italy. His real name was Antonio Domenico Bonaventura Trapassi. He was born in Rome and died in Vienna. For many years he was the poet laureate for the Holy Roman Emperor in Vienna. He is most famous for his librettos (the story and words) for operas. Many composers used them for their operas. More than 800 operas have a libretto by Metastasio.