Thomas Howard, 3rd Duke of Norfolk wed Norfolk's other niece, Catherine Howard, as his fifth wife. As a result of this marriage, for a time, Norfolk enjoyed political prominence, royal favour, and material rewards. However, when Queen Catherine's premarital sexual indiscretions and her alleged adultery with Sir Thomas Culpeper were revealed to King Henry VIII by Archbishop Cranmer, the King's wrath turned on the Howard family, who were accused of concealing her misconduct. Queen Catherine Howard was condemned by a bill of attainder and was later executed on 13 February 1542. Several other members of the Howard family were sent to the Tower, including Norfolk's stepmother,
Agnes Howard, Duchess of Norfolk of the view that there was as much reason to convict the Dowager Duchess of treason as there had been to convict Dereham. However the Council urged leniency, and she was eventually released from the Tower on 5 May 1542. Her stepson, the Duke of Norfolk, escaped punishment, but was never fully trusted again by the King. The Dowager Duchess died in May 1545, and was buried at Thetford Priory on the 31st of that month. On 31 October, as directed in her will, she was re-interred at Lambeth Church in Surrey. Agnes Howard, Duchess of Norfolk Agnes Howard (née