Rotterdam is a municipality and city in the Dutch province of South-Holland, situated in the west of The Netherlands and part of the Randstad. The municipality is the second largest in the country (behind Amsterdam), with a population of approximately 601,300 people and over 2.9 million inhabitants in its metropolitan area (combined with The Hague). The port of Rotterdam is the largest in Europe. From 1962 to 2004, it was the world's busiest port; then it was superseded by Shanghai. Now Rotterdam is the fourth biggest port in the world. Rotterdam is known as a city of architecture. A few square kilometres of the city centre offers a complete overview of what the twentieth century has produced in terms of modern architecture.