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.
Phrynichus (comic poet) Phrynichus ( ; Greek: Φρύνιχος ) was a poet of the Old Attic comedy and a contemporary of Aristophanes. His first comedy was exhibited in 429 BC. He composed ten plays, of which the "Solitary" ("Μονότροπος ") was exhibited at the City Dionysia in 414 along with the "Birds" of Aristophanes and gained the third prize. The "Muses" carried off the second prize at the Lenaia in 405, Aristophanes being first with the "Frogs", in which he accuses Phrynichus of employing vulgar tricks to raise a laugh, of plagiarism and bad versification, and of lowbrow politics.