On 9 October 2026, three stumbling stones were laid for communists that were part of the resistance: Karl Riemer , Johann Riemer and Leo Eichmüller. The men were friends during their incarceration in Dachau Concentration Camp. Initiator of the laying was Ines Eichmüller, the great-niece of Leo Eichmüller. All three survived Dachau.

Karl Xaver Riemer was born on 8 January 1908 in Nuremberg. His parents were the factory worker Johann Michael Riemer and Marie Riemer, née Gaisberger. Karl grew up in Nuremberg and was a painter and illustrator.

On 15 July 1930, he married Luise Baumann, who was born on 30 October 1908 in Nuremberg, as daughter of Philipp Wilhelm and Anna Elisabetha Baumann, née Dachert. On 8 November 1931, the couple moved into the house at An den Rampen 31.

Karl was a member of the Communist Party of Germany and therefore active in the resistance. He was already taken into so-called “protective custody” in April 1933, and his brother Johann in August 1933. They were sent to the Dachau Concentration Camp. Both survived there for 12 years. In Dachau, the brother were friends with the Nuremberg prisoner Leo Eichmüller.

At the end of April 1945, as the US-Army approached, Karl fled the camp in order to inform the US troops about the conditions in the camp and ask that the camp be liberated. Although the US order for the liberation had been given a few hours before and his efforts were most likely only of symbolic value, a street in Dachau is named in honor of Karl Riemer.

After his release he returned to Nuremberg and his wife. They had a son together, Karl-Oskar Riemer, born on 24 April 1946 in Nuremberg.

Karl Riemer died on 23 November 1947; his wife on 21 March 1995.