Fulk FitzWarin at the time of his death in 1197. Whittington Castle lies on the English side of Offa's Dyke, which during the Norman era and before was the border between England and Wales. The site was fortified as a castle by William Peverel in 1138, in support of Empress Matilda, the daughter of King Henry I (1100–1135), in her struggle (known as The Anarchy) for the throne against King Stephen (1135–1154), grandson of William the Conqueror. In the late 1140s the lordship of Whittington, like Oswestry and Overton ceased to be part of England and became part of the Kingdom of
Henry I, Count of Guelders Henry I, Count of Guelders Henry I, Count of Guelders (1117–1182) was Count of Guelders from 1131 until 1182. He was a son of Gerard II of Guelders and Ermgard of Zutphen. In 1138 Hendrik inherited the County of Zutphen from his mother. Hendrik was under tremendous pressure from the Bishopric of Utrecht and the County of Holland, and was forced by Holland to negotiate a treaty with the city of Utrecht; this led to a problematic relation with the Bishop of Utrecht. In 1135 Hendrik married Agnes of Arnstein, daughter of count Louis III of Arnstein. Their daughter Adelaide