Opera
One of the first operas ever written was Ordo Virtutum by  Hildegard of Bingen. Ordo Virtutum (Latin for Order of the Virtues) is an allegorical morality play, or liturgical drama,  composed c. 1151, during the construction and relocation of Bingen's Abbey at Rupertsberg. It is the earliest morality play by more than a century, and the only Medieval musical drama to survive with an attribution for both the text and the music.