Mannheim. Mannheim (German pronunciation: [??manha??m] ; Palatine German: Mannem or Monnem), officially the University City of Mannheim (German: Universit??tsstadt Mannheim), is the second-largest city in Baden-W??rttemberg after Stuttgart, the state capital, and Germany's 21st-largest city, with a population of around 317,000. The city is the cultural and economic centre of the Rhine-Neckar, Germany's seventh-largest metropolitan region, with nearly 2.4 million inhabitants. Mannheim is located at the confluence of the Upper Rhine and the Neckar in the Kurpfalz (Electoral Palatinate) region of northwestern Baden-W??rttemberg. The city lies in the Upper Rhine Plain, Germany's warmest region, between the Palatine Forest and the Oden Forest...