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.
Dyskolos Dyskolos (Greek: , ] , translated as "The Grouch", "The Misanthrope", "The Curmudgeon", "The Bad-tempered Man" or "Old Cantankerous") is an Ancient Greek comedy by Menander, the only one of his plays, and of the whole "New Comedy", that has survived in almost complete form. It was first presented at the Lenaian festival in 317–16 BC, where it won Menander the first-place prize. It was long known only through fragmentary quotations; but a papyrus manuscript of the nearly complete "Dyskolos, "dating to the 3rd century, was recovered in Egypt in 1952 and forms part of the Bodmer Papyri.