Rotterdam is a city and municipality in the Netherlands. It is in the province of South Holland, at the mouth of the Nieuwe Maas channel leading into the Rhine–Meuse–Scheldt delta at the North Sea. Its history goes back to 1270, when a dam was constructed in the Rotte. In 1340, Rotterdam was granted city rights by the Count of Holland. The Rotterdam–The Hague metropolitan area, with a population of approximately 2.7 million, is the 13th-largest in the European Union and the most populous in the country.