Thomas Howard, 3rd Duke of Norfolk, KG, PC (1473 – 25 August 1554) was a prominent English politician and nobleman of the Tudor era. He was an uncle of two of the wives of King Henry VIII, Anne Boleyn and Catherine Howard, both of whom were beheaded, and played a major role in the machinations affecting these royal marriages. After falling from favour in 1546, he was stripped of his Dukedom and imprisoned in the Tower of London, avoiding execution when Henry VIII died on 28 January 1547.