Clerkenwell Priory was a priory of the Monastic Order of the Knights Hospitallers of St John of Jerusalem, in Clerkenwell, London. Run according to the Augustinian rule, it was the residence of the Hospitallers' Grand Prior in England, and was thus their English headquarters. Its great landholding near London until Protestant monarch Edward VI of England was in the former north of Marylebone: St John's Wood which it had farmed out on agricultural tenancies as a source of produce and income.