The House of Keys is the directly elected lower chamber of Tynwald, the parliament of the Isle of Man. Consisting historically of twenty-four members, it served as the representative body of the Manx people, though until the House of Keys Election Act 1866, its members were self-elected rather than popularly chosen. It played a key role in defending Manx interests during the Revestment crisis, issuing its Resolution of March 1765 in protest at the loss of sovereignty.