Diarchy
'Duumvirate' redirects here. For the Roman offices held by duumvirs, see Duumviri. Not to be confused with Coregency, any temporary joint rule over a monarchy. Part of a series of articles on Monarchy Central concepts Monarch Monarchism Divine right of kings Mandate of Heaven Types Absolute Composite Constitutional Diarchy Dual Elective Emirate Ethnarch Federal Hereditary Legalist (Chinese) Non-sovereign Popular Regency Tetrarch Universal History Birth of the Roman Empire Magna Carta Foundation of the Ottoman Empire Glorious Revolution French Revolution Trienio Liberal First French Empire Liberal Wars Second French Empire Italian unification Meiji Restoration German unification 5 October 1910 Revolution Proclamation of the Republic in Brazil Xinhai Revolution Russian Revolution Siamese revolution of 1932 Birth of the Italian Republic Spanish transition to democracy Iranian Revolution Modern Cambodia Nepalese Civil War Related topics Aristocracy Autocracy Crowned republic Conser...