High Quality Content by WIKIPEDIA articles! Guillaume de Machaut (sometimes spelled Machault) (c. 1300 – April 1377) was a Medieval French poet and composer. He is one of the earliest composers on whom significant biographical information is available. According to Daniel Leech-Wilkinson, Machaut was "the last great poet who was also a composer". Well into the 15th century, Machaut`s poetry was greatly admired and imitated by other poets, including Geoffrey Chaucer.