Amsterdam is the capital city of the Netherlands, located in the western part of the country. As the most populous city, Amsterdam has a population of over 810,000 within city limits and over 2 million in the metropolitan area. Originating as a small fishing village in the 12th century, Amsterdam became a major global port and center of trade, finance, and diamonds during the Dutch Golden Age. Its 17th century canals and 19th-20th century defensive structures are now UNESCO World Heritage Sites.