Seattle is the largest city in the US state of Washington. With an estimated population of 780,000, it is the 18th-most populous city in the United States, while the wider Seattle metropolitan area exceeds four million residents. The city lies on an isthmus between Puget Sound and Lake Washington, and it is a major port and gateway for trade with the Asia-Pacific region. Founded in 1851 and named after Chief Seattle, a local Native American leader, the city grew through logging, maritime trade, and the Klondike Gold Rush. In the 20th and 21st centuries, it has been a center for aerospace and technology led by companies such as Boeing, Microsoft, and Amazon. Today, Seattle is a major hub for trade and technology, and is known for its influence on music. This long-exposure photograph shows the skyline of Downtown Seattle at night, with Interstate 5 in the foreground.