Prince Richard was created Duke of York in May 1474 and made a Knight of the Garter the following year. From this time on, it became a tradition for the second son of the English sovereign to be Duke of York. He was created Earl of Nottingham on 12 June 1476. On 15 January 1478, in St Stephen's Chapel, Westminster, when he was about 4 years old, he married the 5-year-old Anne de Mowbray, 8th Countess of Norfolk, who had inherited the vast Mowbray estates in 1476. Because York's father's-in-law dukedom had become extinct when Anne could not inherit it, he was created Duke of Norfolk and Earl Warenne on 7 February 1477. When Anne de Mowbray died in November 1481 her estates should have passed to William, Viscount Berkeley and to John, Lord Howard. In January 1483 Parliament passed an act that gave the Mowbray estates to Richard, Duke of York and Norfolk, for his lifetime, and at his death to his heirs, if he had any. The rights of the two co-heirs at law were extinguished; Viscount Berkeley had financial difficulties and King Edward IV paid off those debts. Berkeley then renounced his claims to the Mowbray estate before parliament in 1483. Nothing was done for Lord Howard.