Phnom Penh is the capital and most populous city of Cambodia. Phnom Penh, along with Siem Reap and Sihanoukville, are significant global and domestic tourist destinations for Cambodia. Founded in 1372, the city is noted for its historical architecture and attractions.Phnom Penh has been the national capital since French colonization of Cambodia, and has grown to become the nation's economic, industrial, and cultural center. Once known as the "Pearl of Asia," it was considered one of the loveliest French-built cities in Indochina in the 1920s.