Tynwald (Manx: Tinvaal), or more formally, the High Court of Tynwald (Manx: Ard-whaiyl Tinvaal) is the bicameral legislature of the Isle of Man. It consists of the directly elected House of Keys and the indirectly chosen Legislative Council.
The Houses sit jointly on Tynwald Day at St John's, and on other occasions in the Legislative Buildings in Douglas. Otherwise, the two Houses sit separately, with the House of Keys originating most legislation, and the Legislative Council acting as a revising chamber. It has been argued that Tynwald is in fact tricameral because in addition to the two branches sitting separately they also sit as a single body.