William of Wykeham or William of Wickham (both: wĭˈkəm) [key], 1324–1404, English prelate and lord chancellor. He is thought to have been the son of a serf. Entering the service of the royal court in 1347, he supervised the building of additions to Windsor Castle and rapidly gained influence at the court of Edward III, becoming royal secretary and lord privy seal (1364). He received benefices in all parts of England but was not ordained a priest until 1362. In 1366 he was appointed bishop of Winchester, and he was made lord chancellor the following year. The debility of the aging Edward III and the strife of factions made his political position extremely difficult. In 1371, William was dismissed, largely as a result of the rising tide of anticlericalism. Opposing John of Gaunt, he supported the attack made on Gaunt's court party in the Good Parliament (1376). As a result he was charged (1376) with previous misuse of government funds, deprived of his temporalities, and harried for almost a year. On Richard II's accession (1377) he was exonerated and devoted most of his remaining life to his episcopal duties, although from 1389 to 1391 he again served as chancellor. His most lasting importance lies in his two great foundations, New College at Oxford (1379) and Winchester College (opened 1394), one of the most famous English public schools. He rebuilt the Norman nave of Winchester Cathedral and repaired many churches of his diocese. A conservative but conscientious churchman, William was a vigorous clerical reformer.
See biography by G. C. Heseltine (1932); W. Hayter, William of Wykeham: Patron of the Arts (1970).