I would certainly think this would fit into the music section, because of the cultural impact of the mystery plays. I learned about the mystery plays back in high school, but don't remember much. Anyone care to enlighten us? Here's an excerpt from the Website Bonzo linked to:

5 August to 1 October

Beginning with the creation and ending with the last judgement, The English Mysteries introduced aspects of medieval life into theatrical representations of the Bible. With community guilds presenting relevant scenes on lavishly decorated wagons or platforms, these collections of plays were developed from the 10th Century up until just before Shakespeare's own plays were performed.

Lavish costumes, ballad singers and musicians bring a rich theatricality to Southwark this summer. Drawing on medieval traditions and inspired by the stories of the Bible, The Globe Mysteries celebrate the spirit of medieval street theatre and processional performance and take a fresh and contemporary look at The Mystery Plays as one of the most important influences on theatre.