Mary was Hebrew from the tribe of Judah. As such, she would have been a practicing Jew. As mother of the Messiah, she would have also been a follower of "The Way", which was the original name for Christianity.
If you mean Mary I, daughter of King Henry VIII and Catherine of Aragon, then the answer is Catholicism.
Mary was a committed Catholic
Queen Mary I was a catholic.
Mary McLeod Bethune was a prominent African American educator and civil rights activist who was a Presbyterian by religion.
Mary, Queen of Scots was a Catholic and no religion was formed around her.
Mary Antrobus has written: 'Needlework in religion' -- subject(s): Religion, Needlework
Mary 1st was a catholic.
mary quigley is the conditions of religion
bloody mary punished people at the protestant religion at what stake
Mary Queen of Scots was Catholic.
Catholic
Christian
Unitarian