More was attached to Henry's court by 1520 and knighted in 1521.
Henry's reaction was to put himself in charge of the church in England. Only the clergy was required to take the intial [Oath of Supremacy]? declaring the sovereign to be the head of the church. More as a layman would not have been subject to this oath; however, he resigned his chancellorship in 1532 rather than serve the regime.
More escaped an initial attempt to connect him with a treasonous matter, but in 1534 Parliament passed the Act of Succession, which included an oath (1) acknowledging the legitimacy of any children born to Henry and [Anne Boleyn]? and (2) repudiating 'any foreign authority, prince, or potentate.' Like the Oath of Supremacy, this was not required of all people, but only those specifically summoned to take it, in other words, those in public office and those under suspicion of not supporting Henry. More was called to take this oath in April of 1535, and on his refusal imprisoned in the Tower of London. He was executed July 6th. His head was displayed on London Bridge for a month, then retrieved (after the payment of a bribe) by his daughter, Margaret Roper.
More is a saint of the Catholic Church, canonized in 1935.