see description "jüdic community center"

Jews lived in Hagen according to written documents since the beginning of the 18th century. They did not have a religious center, but prayed in various private houses until the year 1819, where, among other things, a synagogue and a school were housed in an older half-timbered building.

It was not until 1859 that the Jewish community of Hagen was able to inaugurate its new synagogue in Potthofstraße. Forty years later, the house of worship was rebuilt and rededicated.

The Jewish community Duisburg-Mülheim exists since 1955. The double community joined in 1968 also the Jewish religious community Oberhausen. Today, the congregation consists of about 2,800 members. Many of them come from the successor states of the former Soviet Union. In 1999, the community center was inaugurated on the inner harbor of Duisburg, which was to replace the former community center in Mülheim. 

The Old Synagogue in Bonn was built in 1878/79 on the Judengasse (until 1886, later Tempelstraße), which had been laid out from 1715.
On November 10, 1938, the synagogue and the community hall were set on fire, and the following year they were destroyed and demolished.

The property  passed from the Jewish community to the ownership of the city of Bonn in June 1939. A day care center was built on the property, which was demolished after the end of World War II. The site was used as a parking lot.