Metastasio also wrote librettos for other types of stories set to music. They were used for cantatas, oratorios, ballets and a special type of short opera called an '. An "azione" mostly tells a happy or funny story. They were performed at royal courts to celebrate weddings, birthdays and special anniversaries. One "azione" by Metastasio was called '. The title means "Cupid Wins". It was performed at the Schönbrunn Palace in 1765 to celebrate the wedding of Maria Theresa of Austria's son, Joseph II. Maria Theresa's younger children all sang and danced in "".