Mary I earned the nickname 'Bloody Mary' for persecuting Protestants due to her strong Catholic beliefs.
Mary I earned the nickname 'Bloody Mary' because she persecuted Protestants. Mary I, who reigned from 1553 to 1558 in England, was a fierce Catholic who vigorously persecuted Protestants, even executing several hundred of them. Her religious zeal and harsh actions towards those who opposed Catholicism earned her the infamous nickname 'Bloody Mary'.
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