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 Lysistrata ( or ; Attic Greek: Λυσιστράτη , "Lysistrátē", "Army Disbander") is a comedy by Aristophanes. Originally performed in classical Athens in 411 BCE, it is a comic account of a woman's extraordinary mission to end the Peloponnesian War by denying all the men of the land any sex, which was the only thing they truly and deeply desired. Lysistrata persuades the women of Greece to withhold sexual privileges from their husbands and lovers as a means of forcing the men to negotiate peace—a strategy, however, that inflames the battle between the sexes. The play is notable for being an early exposé of sexual relations in a male-dominated society. Additionally, its dramatic structure represents a shift from the conventions of Old Comedy, a trend typical of the author's career. It was produced in the same year as the "Thesmophoriazusae", another play with a focus on gender-based issues, just two years after Athens' catastrophic defeat in the Sicilian Expedition. At this time, Greek theatre was a profound form of entertainment, which was extremely popular for all audiences as it addressed political issues relevant to that time.