On this Day in Tudor History:

On February 14, 1556, Despite several recantations produced between the end of January and mid-February, Thomas Cranmer submitted himself to the authority of the king and queen and recognised the pope as head of the church.
On 14 February 1556, he was degraded from holy orders and returned to Bocardo Prison, having been declared a heretic by Rome and tried for treason by Queen Mary I.
On March 21, 1556, Cranmer withdrew his recantations and was burned at the stake where Hugh Latimer and Nicholas Ridley were also martyred six months earlier.
Besides being a Protestant and major player in the English split from Rome, Cranmer was made Archbishop of Canterbury by Anne Boleyn and her family and was the one to declare the marriage of Henry VIII and Katherine of Aragon null and void. So when Mary Tudor came to the throne, Cranmer never stood a chance!