Death Mary died at the age of 42 in the palace of Saint James on November 17th of 1558. She was buried at Westminster Abbey, London, United Kingdom on December 14th in 1558 in the chapel of her father, Henry VII. Mary died of uterine cancer and there was probably something with her pituitary gland. 5 years after her burying Mary was succeeded by her half-sister Elizabeth I. Although Mary wished to be buried next to her mother Catherine of Aragon, she was buried in a tomb she would eventually share with Elizabeth I. Mary had been queen for only 5 years and 4 months, but that was long enough for the people. After Mary was buried Phillip II wrote a letter to Mary's half-sister. In the letter he says that he regrets her dead. The Latin inscription