The House of Atreus Act I, released in 1999 is the first part of a metal opera inspired by the  only extant example of an ancient Greek theatre trilogy which won first prize at what festival?
The House of Atreus Act I The House of Atreus Act I, released in 1999, is the ninth studio album by the American heavy metal band Virgin Steele. It has the subtitle "A Barbaric-Romantic Opera". This album is the first part of a metal opera inspired by the Oresteia, a trilogy of Greek tragedies written by Aeschylus which concerns the end of the curse on the House of Atreus. The music was intended to be the soundtrack for theatrical shows, with actors impersonating the characters of the tragedy. The metal opera was actually performed under the name "Klytaimnestra - The House Of Atreus" in European theatres from 1999 to 2001, with the production of the Memmingen Opera House company and Landestheater Production.
Lysistrata (opera) Lysistrata, or The Nude Goddess is an opera in two acts by composer Mark Adamo. The work is based on Aristophanes's fifth century BCE play "Lysistrata". The opera had its world premiere at the Houston Grand Opera on March 4, 2005. It was subsequently produced in March 2006 at the New York City Opera, and it will be produced in San Francisco by Ensemble Parallele in February 2013.