The Book of Common Prayer (BCP) is the title of a number of related prayer books used in the Anglican Communion and by other Christian churches historically related to Anglicanism. The first prayer book, published in 1549 in the reign of King Edward VI of England, was a product of the English Reformation following the break with Rome. The 1549 work was the first prayer book to include the complete forms of service for daily and Sunday worship in English. It contains Morning Prayer, Evening Prayer, the Litany, Holy Communion, and occasional services in full: the orders for Baptism, Confirmation, Marriage, "prayers to be said with the sick", and a funeral service. It also sets out in full the "propers" (the parts of the service that vary weekly or daily throughout the Church's Year): the introits, collects, and epistle and gospel readings for the Sunday service of Holy Communion. Old Testament and New Testament readings for daily prayer are specified in tabular format, as are the Psalms and canticles, mostly biblical, to be said or sung between the readings.
The 1549 book was soon succeeded by a 1552 revision that was more Reformed but from the same editorial hand, that of Thomas Cranmer, Archbishop of Canterbury. It was used only for a few months, as after Edward VI's death in 1553, his half-sister Mary I restored Roman Catholic worship. Mary died in 1558 and, in 1559, Elizabeth I's first Parliament authorised the 1559 prayer book, which effectively reintroduced the 1552 book with modifications to make it acceptable to more traditionally minded worshippers and clergy.