According to Wikipedia: "Venerable John Henry Newman, CO (21 February 1801 - 11 August 1890) was a Roman Catholic priest and Cardinal who converted to Roman Catholicism from Anglicanism in October 1845. In early life, he was a major figure in the Oxford Movement to bring the Church of England back to its Catholic roots. Eventually his studies in history persuaded him to become a Roman Catholic. Both before and after becoming a Roman Catholic, he wrote a number of influential books, including Via Media, Essay on the Development of Christian Doctrine (1845), Apologia Pro Vita Sua (1865-66) and the Grammar of Assent (1870)."