Thomas Cranmer (2 July 1489 – 21 March 1556) was a leader of the English Reformation and Archbishop of Canterbury during the reigns of Henry VIII and Edward VI. He helped build a favourable case for Henry's divorce from Catherine of Aragon which resulted in the separation of the English Church from the Roman Catholic Church. During Cranmer's tenure as archbishop, he was responsible for establishing the first doctrinal and liturgical structures of the Church of England.
When Edward came to power, Cranmer was able to promote major reforms. He wrote and compiled the first two editions of the Book of Common Prayer, a complete liturgy for the English Church. With the assistance of several Continental reformers to whom he gave refuge, he developed new doctrinal standards in areas such as the eucharist, clerical celibacy, the role of images in places of worship, and the veneration of saints.
Cranmer was tried for treason and heresy when Mary I came to the throne. Imprisoned for over two years and under pressure from the Church authorities, he made several recantations and reconciled himself with the Catholic faith. However, on the day of his execution, he dramatically withdrew his recantations and died as a Protestant martyr.