Mülheim, officially Mülheim an der Ruhr (Low German: Mölm; Kölsch: Müllem; German pronunciation: [ˈmyːlhaɪm ʔan deːɐ̯ ˈʁuːɐ̯] ) and also described as "City on the River", is a city in North Rhine-Westphalia in Germany. It is located in the Ruhr Area between Duisburg, Essen, Oberhausen and Ratingen. It is home to many companies, and two Max Planck Institutes. Mülheim an der Ruhr received its town charter in 1808, and 100 years later the population exceeded 100,000, making Mülheim officially a city.
https://en.wikipedia.org/wiki/M%C3%BClheim