text: That causes major issues with most mapping software, as the databases that they use are based on the standard street-number system, and so the software cannot accommodate a completely different system for a small area. A variety of fixes have been tried, none with a high level of success. In particular, the systems have issues because an address on a block can be on any of up to four roads and so attempts to fix the issue by giving the roads false names within the database have often failed to give accurate addressing, but such can still be seen on some platforms like Google Maps. Finding an address in the area thus generally requires resorting to asking directions or using one of the many posted public maps.
  Twin towns – sister cities
  Mannheim is twinned with:
  Swansea, Wales, United Kingdom (1957)
  Toulon, France (1959)
  Charlottenburg-Wilmersdorf (Berlin), Germany (1961)
  Windsor, Canada (1980)
  Riesa, Germany (1988)
  Chișinău, Moldova (1989)
  Bydgoszcz, Poland (1991)
  Klaipėda, Lithuania (2002)
  Zhenjiang, China (2004)
  Haifa, Israel (2009)
  Qingdao, China (2016)
  Chernivtsi, Ukraine (2022)
  Notable people
  Josepha von Heydeck (1748–1771), mistress of Charles Theodore, Elector of Bavaria
  Johann Baptist Cramer (1771–1858), English pianist and composer
  Friedrich Engelhorn (1821–1902), industrialist, founder of BASF
  Marcus Otterbourg (1827–1893), American diplomat, lawyer, and judge
  Richard von Krafft-Ebing (1840–1902), Austro-German psychiatrist
  Carl Benz (1844–1929), engine designer and automotive engineer. He built the first practical motorcar.
  Henry Morgenthau Sr. (1856–1946), American politician and real estate investor
  Robert Kahn (1865–1951), composer and pianist
  Otto Hermann Kahn (1867–1934), investment banker, collector and philanthropist
  Emmy Wehlen (1887–1977), musical comedy actress and silent screen star
  Sepp Herberger (1897–1977), football player and manager