House of Plantagenet
In November 1538, the last surviving member of the House of Plantagenet, Lady Margaret Pole, 8th Countess of Salisbury, was imprisoned at Cowdray until September 1539. She was the niece of Richard III, the last Plantagenet King who died at Bosworth Field in 1485. She was removed to the Tower of London, and was executed in May 1541.