Pierre de Maillezais was the author of a chronicle history in two volumes of Maillezais Abbey, which was located in present-day Charente, France.
This author, a Benedictine monk, is otherwise little known in terms of hard facts; the manuscript of the chronicle, shortened Latin title Qualiter fuit constructum Malliacense monasterium is now dated to c. 1060; or c. 1070, and relating to a foundation "myth". Older works make the author abbot, and place him somewhat later. He is reputed as an admirer of Cicero, founder of a library, and a follower of William IX of Aquitaine on the First Crusade.