Wikipedia:WikiProject Opera/OotM/December2012

— The Composer of the Month focuses on improving opera composers' biographies and articles relating to their works. — The composer of the month for December is Krzysztof Penderecki...

The following articles on his operas are stubs needing expansion:
 * Die schwarze Maske
 * Ubu Rex
 * Paradise Lost

We also lack articles on Jerzy Jarocki, Penderecki's co-librettist for Ubu Rex, and, who created the role of Silvanus Schuller in Die schwarze Maske.