September 2, 2026 – November 15, 2026
Kaplan Mertens – standhaft in bewegter Zeit
The exhibition shows the life and persecution of Matthias Mertens, chaplain in Schmachtendorf, who was deported to the Dachau concentration camp in April 1942.

Municipal Nazi memorial in Schloss Oberhausen with a permanent exhibition on the city's history 1933–1945 and on forced labor in the Ruhr region; free admission.
September 2, 2026 – November 15, 2026
The exhibition shows the life and persecution of Matthias Mertens, chaplain in Schmachtendorf, who was deported to the Dachau concentration camp in April 1942.
The Gedenkhalle opened on September 2, 1962, and has since operated as a municipal institution commemorating the victims of National Socialism. By its own account, it is the oldest continuously operating memorial to the Nazi era in West Germany. From the beginning, it was also intended as a meeting place for young people. It is housed in a side wing of Schloss Oberhausen, which itself was not a site of Nazi persecution.
Over the decades there have been three permanent exhibitions; the current one was installed in 2010. It traces the history of the city between 1933 and 1945, from the Gleichschaltung (enforced conformity) and the persecution of political opponents to the murder of the Jewish population and of Sinti and Roma. A second focus is forced labor between 1939 and 1945, which was ubiquitous in the Ruhr region; documents, biographies, and interviews with former forced laborers make this subject tangible.
In addition to the exhibition, the house is responsible for annual commemorations, for example on January 27, workshops and educational programs for schools, publications, and the Stolpersteine laying ceremonies in the city. In front of the building stands the sculpture "Die Trauernde".
Admission is free.
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Schloss Oberhausen
From Oberhausen Hauptbahnhof, take bus lines 956 and 966 to the Schloss Oberhausen stop.
By car via the A 42 (exit Oberhausen Zentrum, turn right after 200 m) or via the A 40 (exit Mülheim-Styrum, then B 223 to Schloss Oberhausen).
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| Guided tours | yes |
|---|---|
| School programs | yes |
| Good to know | Guided tours, workshops, and educational programs (including for school classes) can be booked via the Gedenkhalle website. |






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