Orderic Vitalis

Orderic Vitalis (Latin: Ordericus Vitalis; 16 February 1075 – c. 1142) was an English chronicler and Benedictine monk who wrote one of the great contemporary chronicles of 11th- and 12th-century Normandy and Anglo-Norman England. Working out of the Abbey of Saint-Evroul, he is credited with writing the Historia Ecclesiastica, a work detailing the history of Europe and the Mediterranean from the birth of Jesus Christ into his own age. The son of a cleric, he was born into a noble family, claiming both English and Norman heritage. While he is known primarily for the Historia Ecclesiastica, he held various positions within the abbey including script master, librarian, and cantor. A prolific writer, he addressed various topics in his writings, both religious and secular. Modern historians view him as a reliable source.

Notable works: Ecclesiastical history

Source: Wikipedia — https://en.wikipedia.org/wiki/Orderic_Vitalis