Thomas de Berkeley, 5th Baron Berkeley Thomas de Berkeley, 5th Baron Berkeley Thomas de Berkeley, 5th Baron Berkeley (5 January 1352/53 – 13 July 1417), "The Magnificent", of Berkeley Castle and of Wotton-under-Edge in Gloucestershire, was an English peer and an admiral. His epithet, and that of each previous and subsequent head of his family, was coined by John Smyth of Nibley (d.1641), steward of the Berkeley estates, the biographer of the family and author of "Lives of the Berkeleys". He was born at Berkeley Castle in Gloucestershire, the son and heir of Maurice de Berkeley, 4th Baron Berkeley by his wife Elizabeth le Despencer. In
Berkeley Castle received a royal charter from King Henry II giving him permission to rebuild the castle. Fitzharding built the circular shell keep during 1153–56, probably on the site of the former motte. The building of the curtain wall followed, probably during 1160–90 by Robert and then by his son Maurice. Much of the rest of the castle is 14th century and was built for Thomas de Berkeley, 3rd Baron Berkeley: Thorpe's Tower, to the north of the keep, the inner gatehouse to its southwest, and other buildings of the inner bailey. The castle was ransacked in 1326 by the forces of