The Danube–Black Sea Canal (Romanian: Canalul Dunăre – Marea Neagră) is a canal in Romania, which runs from Cernavodă, on the Danube, to Constanța (southern arm, as main branch), and to Năvodari (northern arm), on the Black Sea. Administrated from Agigea, it is an important part of the European canal system that links the North Sea (through the Rhine–Main–Danube Canal) to the Black Sea. The main branch of the canal, with a length of 64.4 km (40.0 mi), which connects the Port of Cernavodă with the Port of Constanța, was built in 1976–1984, while the north branch, known as the Poarta Albă – Midia Năvodari Canal, with a length of 31.2 km (19.4 mi), between Poarta Albă and Port of Midia, was built in 1983–1987.