Earl Richard probably did more both for the castle and the town than any other of its lords. He lived here in great state, enriching the townsmen by the liberal expenditure of his wealth and by the hospitality with which he entertained the court and the nobles of the realm. Two years after he came into possession he built the great hall of the Castle, and though this has disappeared, some of the arches of the bridge survive, vaulted with massive ribs, which certainly belong to this period and are probably Richard's work. Here too he brought his second bride, Senchia of Provence, in 1242, when the King and his court took part in sumptuous festivities to welcome her. He was elected King of the Romans in 1256, but the subsequent coronation at Rome, which would have made him German Emperor, never took place. Afterwards, when he was absent in Germany, the barons under Simon de Montfort, Earl of Leicester, were rebelling against the King, and Wallingford Castle fell into their hands. The Countess of Leicester was residing here in 1262, when the Earl visited her and a hundred and sixty-two horses were picketed within the Castle walls. The next year Richard was again in possession, and repelled successfully an assault of the barons; but after the disastrous battle of Lewes in 1264, it fell into Leicester's hands once more, and both Richard and the King, as well as Prince Henry, the son of Richard, were prisoners in it. The two Kings were removed to Kenilworth; but the next year, when Prince Edward, the King's son, defeated the barons at Evesham, King Henry was restored to his throne and Richard returned to his Castle. He died in the spring of 1272, and Wallingford Castle, together with the earldom of Cornwall, passed to his son Edmund. The new earl maintained the magnificence of his father. At the close of the year he introduced his bride, Margaret de Clare, sister of the Earl of Gloucester, with a splendid entertainment; he frequently received as a guest his cousin, King Edward I.; and he so largely augmented the Collegiate Church of St. Nicholas in the Castle that he is often called its founder. When he died, in 1299, Wallingford fell to the King. Immediately upon the accession of Edward II., the Earldom of Cornwall, with the lordship of Wallingford, was bestowed upon his unworthy favourite, Piers de Gaveston, who married Earl Edmund's widow; but his insolent career was cut short by the Earl of Warwick, under whose custody he was beheaded at Blacklow Hill. Another of the King's favourites, Hugh Despencer the younger, held the Castle and Honour for a time, until, in 1326, he fell a victim to the vengeance of Queen Isabella, who was now in open rebellion against her husband. She had already become possessed of the Castle, and eventually bestowed it upon her paramour, Roger Mortimer. Then followed the horrible murder of Edward II. at Berkeley; then Mortimer paid the penalty of his crimes at Tyburn, and Isabella became a prisoner at Castle Rising.