Anglican doctrine is not handed down by a single leader, nor is it derived from a single founder, like Calvinism. Rather Anglicanism is founded on prayer books, particularly the Book of Common Prayer, dating to 1549. Because there is such a broad array of Anglican-influenced churches, there is a broad range of doctrines. Some Anglicans, for example, believe in justification by faith alone, while others believe in a combination of good works, sacraments, and faith. A faith which was once seen as a middle path between Protestantism and Catholicism still retains much of the ceremony of the Catholic Church, but has also expanded to encompass a great deal of diversity of opinion on theological matters. In general, though, the emphasis on prayer books and liturgy is a defining characteristic of Anglicanism.