Maurilius was an 11th-century Norman archbishop of Rouen who was recognized for his commitment to ecclesiastical reform. Born in Reims around 1001, he lived a varied religious life, serving as a priest, a monk at Fecamp Abbey, and a hermit at Vallombrosa. Following his tenure as an abbot in Florence, he was appointed to lead the archdiocese of Rouen, succeeding Mauger. He was highly regarded by his peers for his scholarly intellect and his holy character, which helped him navigate the religious transitions of his era.