Heritage Open Day: St. Gregory's church - famous for Simon of Sudbury, Archbishop of Canterbury 1381 Medieval church with rare 15th century christening font cover and complete set of misericord seats. See Simon of Sudbury's head not normally available for public viewing. Simon of Sudbury was the Archbishop of Canterbury before meeting a messy death at the hands of a London mob in the Peasants Revolt in 1381. Simon was at the Tower of London where he was decapitated by the peasants. This is the only time that the walls of the Tower have been breached. The rest of his body lies inside Canterbury Cathedral.