The castle had been founded in the late 11th century by Ivo de Vesci, a Norman nobleman from Vassy, Calvados in Normandy. A descendant of Ivo de Vesci, John de Vesci succeeded to his father's titles and estates upon his father's death in Gascony in 1253. These included the barony of Alnwick and a large property in Northumberland and considerable estates in Yorkshire, including Malton. As John was underage, King Henry III of England conferred the wardship of his estates to a foreign kinsmen, which caused great offence to the de Vesci family. The family's property and estates had been put into the guardianship of Antony Bek, who sold them to the Percys. From this time the fortunes of the Percys, though they still held their Yorkshire lands and titles, were linked permanently with Alnwick and its castle and have been owned by the Percy family, the Earls and later Dukes of Northumberland since. The stone castle Henry Percy bought was a modest affair, but he immediately began rebuilding. Though he did not live to see its completion, the construction programme turned Alnwick into a major fortress along the Anglo-Scottish border. His son, also called Henry (1299–1352), continued the building. The Abbot's Tower, the Middle Gateway and the Constable's Tower survive from this period. The work at Alnwick Castle balanced military requirements with the family's residential needs. It set the template for castle renovations in the 14th century in northern England; several palace-fortresses, considered "extensive, opulent theatrical" date from this period in the region, such as the castles of Bamburgh and Raby. In 1345 the Percys acquired Warkworth Castle, also in Northumberland. Though Alnwick was considered more prestigious, Warkworth became the family's preferred residence.