Thomas Cromwell’s head was displayed on a spike on London Bridge but after the birds tired of it, it was buried in the Henry VIII’s Revenge Wing in the Tower, along with that of More and Ann Boleyn (one of the King’s ex’s).
It eventually fell off during a violent storm, was picked up by a sentry, and passed from hand to hand (and put on exhibition several times) until the 1960s, when it was buried in an undisclosed location at Sidney Sussex College, Cambridge (Cromwell's alma mater).
His own mother wouldn't know him, but tests have confirmed "to a moral certainty" that the head is in fact that of the late Lord Protector.