Thomas Cranmer was a prominent figure in the English Reformation during the 16th century. He served as the Archbishop of Canterbury and played a key role in the establishment of the Church of England as a separate entity from the Roman Catholic Church. Cranmer was known for his support of Protestant theology and his efforts to reform the practices and beliefs of the English church. He also played a significant role in the development of the Book of Common Prayer, which remains an important liturgical text in Anglican churches today. Cranmer's influence on the English Reformation and the establishment of the Church of England as a Protestant institution is widely recognized.