History of Bristol Welsh estate and Robert of Caen became the first Earl of Gloucester, c. 1122. He is believed to have been responsible for completing Bristol castle. In 1135 Henry I died and the Earl of Gloucester rallied to the support of his sister Matilda against Stephen of Blois who had seized the throne on Henry's death. Stephen attempted to lay siege to Robert at Bristol in 1138 but gave up the attempt as the castle appeared impregnable. When Stephen was captured in 1141 he was imprisoned in the castle, but when Robert was captured by Stephen's forces, Matilda was forced to
Treaty of Alton Treaty of Alton The Treaty of Alton was an agreement signed in 1101 between Henry I of England and his older brother Robert, Duke of Normandy in which Robert agreed to recognize Henry as king of England in exchange for a yearly stipend and other concessions. The agreement temporarily ended a crisis in the succession of the Anglo-Norman kings. The previous year, Henry had seized the throne on the death of his brother William II, even though Robert had been William's acknowledged heir. Robert's absence in the First Crusade at the time of William's death, as well as his poor