This ruler propped up the independence of Morgannwg and Gwynllwg as buffer states between his kingdom and that of Rhys ap Tewdwr.
This ruler propped up the independence of Morgannwg and Gwynllwg as buffer states between his kingdom and that of Rhys ap Tewdwr. He gave border regions to relatively autonomous Marcher Lords. Earlier, with Henry I of France, he had put down a rebellion at Val-es-Dunes. He was advised by Lanfranc of Pavia in a campaign blessed by Pope Alexander II. This ruler died after the Siege of Mantes, where he fell off a horse. His advisor, William of St. Calais, compiled a census. He defeated the victor at Stamford Bridge in a clash depicted in the Bayeux Tapestry, in which that loser, Harold Godwinson, was killed. For 10 points, name this duke of Normandy who ordered the compilation of the Doomsday Book and whose victory at Hastings paved the way for him to take over England.
This ruler propped up the independence of Morgannwg and Gwynllwg as buffer states between his kingdom and that of Rhys ap Tewdwr.
William the Conqueror [accept William I of England or William the Bastard; accept William II of Normandy until mentioned]