Kopernikus

Kopernikus (sub. Rituel de mort; translated as Ritual of Death) is a 1979 opera in two acts by Canadian composer Claude Vivier, inspired by the astronomer of the same name. It is the only opera of three that Vivier completed prior to his death in 1983. A typical performance lasts around seventy minutes.

Text from the Wikipedia article "Kopernikus (Vivier)", licensed CC BY-SA 4.0.