What is "l'orfeide"

L'Orfeide is an opera composed by Gian Francesco Malipiero who also wrote the Italian libretto, partly based on the myth of Orpheus and incorporating texts by Italian Renaissance poets. The work consists of three parts – La morte delle maschere (The death of the masks), Sette canzoni (Seven songs), and Orfeo, ovvero L'ottava canzone (Orpheus, or The eighth song). It received its first complete performance on 5 November 1925 at the Stadttheater in Düsseldorf.