Erasmus of Rotterdam wrote the essay The Praise of Folly during a week at Sir Thomas More's estate in Bucklersbury. He later refined and extended the piece. In it he personifies Folly as a god, whose companions are likewise-personified sins and human weaknesses. His work criticizes the Catholic Church, and culminates in a statement of Christian ideals. Erasmus was a faithful Catholic, but his text is considered a catalyst to the Protestant movement.