Q: In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
Machaut wrote the " Messe de Nostre Dame " , the earliest known complete setting of the Ordinary of the Mass attributable to a single composer .
A:
Machaut wrote a mass known as " Messe de Nostre Dame " .