The Act of Uniformity was a law passed in England in 1549 during the reign of King Edward VI. It aimed to establish a standard form of worship across the Church of England, promoting the use of the Book of Common Prayer. This act was part of the broader Protestant Reformation, which sought to reform the practices of the Catholic Church. The Act required all clergy and parishioners to follow the new liturgical guidelines, ensuring uniformity in religious services. Failure to comply could result in penalties, reflecting the government's desire to unify religious practices and reduce divisions within Christianity in England.