The Abbaye Blanche ("White Abbey"), was a nunnery founded in 1112 in Mortain, France.
In 1105, Count William of Mortain built a convent of which Alina became the first superior.
Some depictions with Gabriel date back to the 8th century, e.g. the stone casket at Notre Dame de Mortain church in France.
The 1st would later repel a German counteroffensive at Mortain, and pursue the German Army across France, culminating in the Battles of Aachen and the Huertgen Forest.
On his death the county of Boulogne was inherited by his daughter, Matilda, and her husband Stephen de Blois, count of Mortain, afterwards king of England, and at the death of Matilda in 1152 it was inherited by their son, Eustace IV of Boulogne, later their second son William and ultimately by their daughter Marie of Boulogne, since both sons died without children.
Eberbach was directed to lead this force in the counterattack through Mortain toward Avranches that was intended to cut off the Allied forces which had broken out of Normandy.
Willie Schopp, would be shot down and killed in Messerschmitt Bf 110 G-4 (Werknummer 140320—factory number) on the night of 6/ 7 August 1944 at Mortain on the Cotentin (Cherbourg) Peninsula.
Catherine's husband gave the County of Mortain, from Catherine's dowry to John the Fearless, Duke of Burgundy, to free his wife, during the Armagnac-Burgundian Civil War in 1417, she had been taken prisoner by Bernard VII of Armagnac and did not care for their financial supply.
In 1191 John, Count of Mortain, (later King John of England) had granted the church of Walesby and its chapelry of Haughton to the church of St Mary, Rouen, and in 1257, Ludham confirmed Rouen's authority to present Walesby's vicar, and specified among his dues and duties the chapel of Hockton with its tithes, and the joint funding with Rouen of repairs, rebuilding, books, vestments and other alterages.