Which parts of the Book of Common Prayer were written or shaped by Thomas Cranmer?

Thomas Cranmer, the first Protestant archbishop of Canterbury, was the primary architect behind the Book of Common Prayer during the reign of Edward VI.21

Cranmer took the leading role in drafting both the 1549 and 1552 editions of the prayer book. While he collaborated with foreign theologians—most notably Martin Bucer, whose influence is particularly evident in the Communion service of the 1552 edition—Cranmer was personally responsible for the bulk of the work.2

His contributions extended beyond general structure; he also composed a litany that remains in use today. Through his learning and poetic sensibility, Cranmer shaped the liturgy of the Church of England, moving it from a moderate Protestant position in 1549 to a more outspokenly Protestant stance by 1552. His work established the enduring doctrine, ritual, and liturgical beauty of the Anglican church.12