The two crossword solutions for the term CITY ON THE WESER are BREMEN (6 letters) and HAMELIN (7 letters). BREMEN is a city in northwestern Germany, located on the River Weser. It is the capital of the state of BREMEN and the second most populous city in northern Germany. Hamelin is a town in Lower Saxony, Germany, located on the River Weser. It is best known for the Pied Piper of Hamelin legend, which dates back to the Middle Ages.