Hanau (German pronunciation: [ˈhaːnaʊ̯]) is a city in the Main-Kinzig-Kreis, in Hesse, Germany. It is 25 km east of Frankfurt am Main and part of the Frankfurt Rhine-Main Metropolitan Region. Its railway station is a major junction and it has a port on the river Main, making it an important transport centre. The city is known for being the birthplace of Jakob and Wilhelm Grimm and Franciscus Sylvius. Since the 16th century it was a centre of precious metal working, with many goldsmiths. It is home to Heraeus, one of Germany's largest family-owned companies.
https://en.wikipedia.org/wiki/Hanau