King Louis XVI of France was executed via guillotine on 21 January 1793, and his daughter Marie Thérèse petitioned Rome for the canonization of her father. Pius VI hailed the late king as a martyr on 17 June 1793 in a meeting with cardinals, giving hope to a potential possibility of sainthood. In 1820, two decades following the death of Pius VI, the Congregation of Rites put an end to the possible sainthood since it was impossible to prove the king died for religious reasons rather than political ones. Pius VI argued that the main thrust of the revolution was against the Catholic religion and Louis XVI himself.