Phnom Penh is the capital and most populous city of Cambodia. It has been the national capital since the French protectorate of Cambodia and has grown to become the nation's primate city and its economic, industrial, and cultural centre. Before Phnom Penh became capital city, Oudong was the capital of the country. Phnom Penh succeeded Angkor Thom as the capital of the Khmer nation but was abandoned several times before being reestablished in 1865 by King Norodom.