These memorial stones (so called Stolpersteine of stumbling blocks) commemorate:
Theodor Katz (born 1882, murdered in Auschwitz in 1944)
Liesel Katz (born 1928, murdered in Auschwitz in 1944)
Martha Katz (born 1896, murdered in Auschwitz in 1944)
Elfriede Nathan (born 1923, murdered in Chelmno / Kulmhof in 1942)
Leopold Stock (born 1884, murdred in Bochum in 1944)
Helene Stock (born 1892, murdered in Stutthof in 1945)
The small copper plaques, in the pavement in front of houses of which the (mostly Jewish) residents were murdered by the Nazis, mention the name, date of birth and place (mostly a concentration camp) and date of death.
In many other cities, mainly in Germany but also in other European countries, the memorials also can be found. There are already many thousands of these plaques and their number is still counting. Almost all Stolpersteine are laid by the German artist himself, Gunter Demnig.
For more information and pictures, please visit Stolpersteine in Cologne (in German).
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