William FitzWilliam (Lord Deputy) William FitzWilliam (Lord Deputy) Sir William FitzWilliam (1526–1599) was an English Lord Justice of Ireland and afterwards Lord Deputy of Ireland. In 1587, as Governor of Fotheringhay Castle, he supervised the execution of the death sentence on Mary, Queen of Scots. He was the Member of Parliament for Peterborough and represented County Carlow in the Irish House of Commons. He lived at Gainspark, Essex, and Milton Hall. FitzWilliam was born at Milton Hall, Northamptonshire, the eldest son of Sir William (d. 1576) and grandson of William Fitzwilliam, Sheriff of London, who had been treasurer and chamberlain to Cardinal Wolsey and
Peterborough Cathedral were lost. The church survived by being selected as the cathedral of the Anglican Diocese of Peterborough. Henry's former wife, Catherine of Aragon, had been buried there in 1536. Her grave can still be seen and is still honoured by visitors who decorate it with flowers and pomegranates (her symbol). It carries the legend "Katharine Queen of England", a title she was denied at the time of her death. In 1587, the body of Mary, Queen of Scots was initially buried here after her execution at nearby Fotheringhay Castle, but it was later removed to Westminster Abbey on the orders