Andrew and Frederick II, Duke of Austria, signed a peace treaty in late 1233. Andrew, who had been widowed, married the 23-year-old Beatrice D'Este on 14 May 1234, even though his sons were sharply opposed to his third marriage. John, Bishop of Bosnia, put Hungary under a new interdict in the first half of 1234, because Andrew had not dismissed his non-Christian officials despite his oath of Bereg. Andrew and Archbishop Robert of Esztergom protested against the bishop's act at the Holy See.