Columbanus

Columbanus (c. 543-615) was an Irish monk and missionary whose travels carried Hiberno-Latin monasticism into Merovingian Gaul, Alemannia, and northern Italy. Trained at the monastery of Bangor in Ulster, he crossed to Gaul around 590 and founded influential houses at Annegray, Luxeuil, and Fontaines, imposing his austere Rule and Irish Easter computus until conflict with the Frankish episcopate and the court of Brunhilda drove him into exile. He ended his life founding the abbey of Bobbio in the Apennines, which became a major center of learning and manuscript preservation. His surviving letters - including bold, learned appeals to popes Gregory the Great and Boniface IV on the Easter controversy and the Three Chapters schism - are among the most vivid documents of early medieval intellectual life, displaying his command of Latin rhetoric and his willingness to admonish even the papacy.