According to legend the diocese was founded by Nicaisius, a disciple of St. Denis who was martyred after arriving in Normandy. It became an archdiocese probably around 744 with the accession of Grimo. Archbishop Franco baptized Rollo of Normandy in 911, and the archbishops were involved in the Norman Conquest of England in 1066. Normandy was annexed to France in 1204, and Rouen was later occupied by England from 1419 to 1449 during the Hundred Years' War. In 1562 the city was briefly captured by Huguenots during the French Wars of Religion.