The French Kingdom , commonly known as the July Monarchy , was a liberal constitutional monarchy in France under Louis Philippe I, starting with the July Revolution of 1830 (also known as the Three Glorious Days) and ending with the Revolution of 1848. It began with the overthrow of the conservative government of Charles X and the House of Bourbon. Louis Philippe, a member of the traditionally more liberal Orléans branch of the House of Bourbon, proclaimed himself Roi des Français ("King of the French") rather than "King of France", emphasizing the popular origins of his reign. The king promised to follow the "juste milieu", or the middle-of-the-road, avoiding the extremes of the conservative supporters of Charles X and radicals on the left. The July Monarchy was dominated by wealthy bourgeoisie and numerous former Napoleonic officials. It followed conservative policies, especially under the influence (1840–48) of François Guizot. The king promoted friendship with Britain and sponsored colonial expansion, notably the conquest of Algeria. By 1848, a year in which many European states had a revolution, the king's popularity had collapsed and he was overthrown.