Perceived as a critical source of anti-Catholic material by its contemporaries, The Book of Martyrs exerted considerable influence on English Protestantism. With Foxe’s histories of Protestant martyrs, the text provided affirmation of religious reformation during the period of conflict between Protestantism and Catholicism. Following the Catholic reign of Mary Tudor, Queen Elizabeth permitted the copious spread of The Book of Martyrs to be available to the educated and the common folk. With its spreading popularity, Foxe's book shaped notions of Catholicism as the other evil. From pride and strength came the endorsement of denouncing Catholicism and its believers. Foxe’s Book of Martyrs is a subjective piece that promotes Protestant martyrdom and warns people of the violence that emanates from Catholicism. The Book of Martyrs provided the framework to unify England as a Protestant nation and regain strength in nationalism (King).