Mary I (18 February 1516 – 17 November 1558) is Queen regnant of England and Queen regnant of Ireland from 19 July 1553 until her death.

She is the eldest daughter of Henry VIII and only surviving child of Catherine of Aragon.

As the fourth crowned monarch of the Tudor dynasty, she is remembered for restoring England to Roman Catholicism after succeeding her short-lived half brother, Edward VI, to the English throne.

In the process, she has almost 300 religious dissenters burned at the stake in the Marian Persecutions, earning her the sobriquet of "Bloody Mary".

Her reestablishment of Roman Catholicism is reversed by her successor and half-sister, Elizabeth I.