Renaissance Research Conservatory Project Pop Quiz: Performances Of Modern Oratorios And Oratorio Libretto Publication In The Former Soviet Union

Renaissance Research Conservatory Project Pop Quiz:

Which two major Western European oratorios from the early part of the twentieth century were first performed in the Soviet Union in 1983?

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Header photo credit: Scene from Battlestar Galactica 2009 courtesy the Sci Fi Channel. [Click on image for enlargement.]