The Weser () is a river in north-western Germany. Formed at Hann. Münden by the tributary (confluence) of the Fulda and Werra, it flows through the historic (Hanseatic League) port city of Bremen and 50 km later it enters the North Sea at Bremerhaven, which is also a seaport. On the opposite (west) bank is the town of Nordenham at the foot of the Butjadingen Peninsula, which places the rivers mouth in Lower Saxony. It has an overall length of 452 km. Together with its Werra tributary, which originates in Thuringia, its length is 744 km. Linguistically the name of both rivers, Weser and Werra, goes back to the same source, the differentiation being caused by the old linguistic border between Upper und Lower German, which touched the region of Hannoversch Münden. The Weser is the longest German river to reach the sea the course of which lies entirely within the national territory. The top section of its course leads through a