A Letter Concerning Toleration by John Locke was written 1685-1686 when Locke was living in exile in the Netherlands, known for its religious tolerance. It is addressed to an anonymous "Honored Sir", later identified as Dutchman Philipp van Limborch. The Letter was originally composed in Latin and was published in English translation in 1689 by William Popple, without Locke's knowledge. The work was written amidst increasing religious turmoil in England. Locke argues for the separation of church and state, with religious toleration as a way to promote religious peace.