The memorial is located on the site of the former riding and tournament ground "Unter den Eichen", where the Wiesbaden subcamp "Unter den Eichen" was set up in the immediate vicinity. Organizationally, this belonged to the SS special camp/camp Hinzert in the Hunsrück region near Hermeskeil. The memorial is housed in a former command bunker that the prisoners had to build for the Wiesbaden administrative office of the Schutzstaffel (SS).

The subcamp was built after the Allied air raids on German territory increased dramatically in 1942. As a result, the SS were forced to build better protected alternative quarters for their offices on the outskirts of the city. Jürgen Stroop, Higher SS and Police Leader Rhine/Westmark based in Wiesbaden, requested prisoners from the SS special camp Hinzert for this purpose. The first arrived in the spring of 1944. The rather small "Unter den Eichen" concentration camp consisted of just five simple wooden barracks and was surrounded by a barbed wire fence. A maximum of 100 prisoners were interned there. Most of them were Luxembourgers, but there were also Dutch, French, one Belgian and one German.

The camp was under the control of the SS and was guarded by police.

SS men and police guards found shelter from air raids in the command bunker. The prisoners, on the other hand, were generally denied access. In such cases, they had to seek shelter in splinter trenches. As a result, six Luxembourg prisoners died in a bombing raid on December 18, 1944.

The Wiesbaden subcamp existed until March 23, 1945, when the prisoners were ordered on an evacuation march towards Frankfurt to be shot there. However, the commanding officer in charge did not carry out the order and sent the prisoners on foot in the direction of Friedberg. Some prisoners had already managed to escape to Wiesbaden and found shelter in the "Unter den Eichen" air and sunbathing strip and the Café Ritter, among other places, until they were liberated by the Americans on March 28.

The permanent exhibition is divided into the following thematic focus areas:

• Wiesbaden during the National Socialist era
• History of the "Unter den Eichen" site
• The SS special camp / Hinzert concentration camp
• History of the SS and police in Wiesbaden
• The Wiesbaden satellite camp "Unter den Eichen"
• Establishment of the memorial site

The concentration camp memorial is open to visitors every Saturday from 2 pm to 4 pm from May to October inclusive.

Guided tours are available by appointment at stadtarchivwiesbadende or by telephone on (0611) 313080.

The "Unter den Eichen" memorial is located in Carl-von-Ibell-Weg opposite house number 7 and is administered by the Wiesbaden City Archive.

Bärbel Maul, Axel Ulrich: The Wiesbaden satellite camp "Unter den Eichen" of the SS special camp / Hinzert concentration camp. Published by: City of Wiesbaden, Cultural Office - City Archive. 8th edition Wiesbaden 2014.