books.google.co.uk - The motet began as a form of sacred vocal music in several parts; a cantus firmus or tenor, drawn from sacred Latin chant, served as a foundation for one or more upper voices. The French motet was a well-established form by the middle of the thirteenth century, as were bilingual motets that combined...http://books.google.co.uk/books/about/Allegorical_Play_in_the_Old_French_Motet.html?id=db4BMOeki3IC&q=sorrow&utm_source=gb-gplus-shareAllegorical Play in the Old French Motet
