The Vicar of Bray is a satirical description of an individual fundamentally changing his principles to remain in ecclesiastical office as external requirements change around him. The religious upheavals in England from 1533 to 1559 (and then from 1633 to 1715) made it impossible for any devout clergyman to comply with all the successive requirements of the established church. The original figure was the vicar Simon Aleyn, although clerics who faced vicissitudes resulted in revised versions of the story.
A satirical 18th-century song, "The Vicar of Bray", recounts the career of a vicar of Bray, Berkshire, towards the end of this period and his contortions of principle in order to retain his ecclesiastic office despite the changes through the course of several monarchs from Charles II to George I. A comic opera covers a later period in 18th-century history, while a film set in Bray, County Wicklow, in Ireland, covers Charles I, the English Civil War, the Commonwealth of England, The Protectorate, and restoration of Charles II.
The figure described was Simon Aleyn between 1540 and 1588; he preached the Bible and oversaw the baptism, confirmation, marriage and burial of his hundreds of parishioners in the reigns of Henry VIII, Edward VI, Mary, and Elizabeth as the church minister of the 15 square miles (39 km2) almost wholly agriculturally cultivated parish, today much reduced, of Bray.