
Requiem
An anonymous stranger commissioned it and Mozart died before finishing. A pupil completed the rest, and arguments about which bars are his continue.

An anonymous stranger commissioned it and Mozart died before finishing. A pupil completed the rest, and arguments about which bars are his continue.

Bach assembled it late in life partly from music he had written decades earlier, and never heard the whole thing performed in his lifetime.

Machaut left money for this mass to be sung at an altar in Reims Cathedral in his memory, and it was, for centuries.

The legend that it saved church polyphony from being banned is probably untrue, but the words really do stay audible through six voices.

Josquin takes a plainchant hymn and dissolves it into four voices that imitate each other continuously, so the tune is everywhere and nowhere.

Byrd was a Catholic in Protestant England, and wrote these to be sung in secret at private houses. They were printed without title pages.