Phnom Penh is the capital and most populous city of Cambodia. Located on the banks of the Mekong River, it is the economic, industrial, and cultural hub of the country. It was founded in 1434 and has since grown to become one of the most important cities in Southeast Asia. The city is home to many historical sites, including the Royal Palace and the National Museum. It is also a popular tourist destination, offering a variety of attractions, from markets and temples to nightlife and entertainment.