A priest hole is a hiding place for a priest built in England or Wales during the period when Catholics were persecuted by law. Following the accession of Queen Elizabeth I to the throne in 1558, there were several Catholic plots designed to remove her, and severe measures, including torture and execution, were taken against Catholic priests. From the mid-1570s, hides were built into houses to conceal priests from priest hunters. Most of the hides that survive today are in country manor houses, but there is much documentary evidence, for example in the Autobiography and Narrative of the Gunpowder Plot of John Gerard, of hides in towns and cities, especially in London.

A priest hunter was a person who, acting on behalf of the English and later British government, spied on or captured Catholic priests during Penal Times. Priest hunters were effectively bounty hunters. Some were volunteers, experienced soldiers or former spies.