John Whitehead at Once I Was a Clever Boy has this interesting post comparing the lives of Margaret Beaufort and Blessed Margaret Pole. He include this photo of the vault in the chantry chapel the Margaret Pole, Countess of Salisbury built for herself in Christchurch Priory in Hampshire (the priory's website includes an excellent virtual tour) in 1529. She was actually buried in St Peter ad Vincula in the Tower of London after her brutal execution. (Photo: Paradoxplace.com). Margaret Beaufort is buried in Westminster Abbey.