The Pilgrimage of Grace was a popular revolt beginning in Yorkshire in October 1536, before spreading to other parts of Northern England including Cumberland, Northumberland, and north Lancashire, under the leadership of Robert Aske. The "most serious of all Tudor period rebellions", it was a protest against Henry VIII's break with the Catholic Church, the dissolution of the lesser monasteries, and the policies of the King's chief minister, Thomas Cromwell, as well as other specific political, social, and economic grievances.