Thomas de Berkeley, 1st Baron Berkeley died at Berkeley Castle on 23 July 1321 and was succeeded in his titles by his eldest son Maurice de Berkeley, 2nd Baron Berkeley. Thomas de Berkeley, 1st Baron Berkeley Thomas de Berkeley, 1st Baron Berkeley (c.1251 – 23 July 1321), "The Wise", feudal baron of Berkeley, of Berkeley Castle in Gloucestershire, England, was a peer, soldier and diplomat. 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". Thomas de Berkeley
Edward II of England move was highly unpopular. Isabella and Mortimer both amassed, and spent, great wealth, and criticism of them mounted. Relations between Mortimer and the young Edward III became strained and in 1330 the King conducted a "coup d'état" at Nottingham Castle. He arrested Mortimer and then executed him on fourteen charges of treason, including the murder of Edward II. Edward III's government sought to blame Mortimer for all of the recent problems, effectively politically rehabilitating the late King. The King spared Isabella, giving her a generous allowance, and she soon returned to public life. Edward's body was embalmed at Berkeley Castle,