Information: Wikipedia

A Stolperstein literally "stumbling stone", metaphorically a "stumbling block" is a sett-size, 10 by 10 centimetres (3.9 in × 3.9 in) concrete cube bearing a brass plate inscribed with the name and life dates of victims of Nazi extermination or persecution.

The Stolpersteine project, initiated by the German artist Gunter Demnig in 1992, aims to commemorate individuals at exactly the last place of residency—or, sometimes, work—which was freely chosen by the person before he or she fell victim to Nazi terror, euthanasia, eugenics, was deported to a concentration or extermination camp, or escaped persecution by emigration or suicide. As of 29 March 2018, over 67,000 Stolpersteine have been laid in 22 countries, making the Stolpersteine project the world's largest decentralized memorial.

The majority of Stolpersteine commemorate Jewish victims of the Holocaust. Others have been placed for Sinti and Romani people (then also called "gypsies"), homosexuals, the physically or mentally disabled, Jehovah's Witnesses, black people, members of the Communist Party, the Social Democratic Party, and the anti-Nazi Resistance, the Christian opposition (both Protestants and Catholics), and Freemasons, along with International Brigade soldiers in the Spanish Civil War, military deserters, conscientious objectors, escape helpers, capitulators, "habitual criminals", looters, and others charged with treason, military disobedience, or undermining the Nazi military, as well as Allied soldiers.

Bockum, 17 March 1866 – Auschwitz, 6 September 1944. Reached the age of 78 years.

Fanny Wolff-Goldstein, 78 years old, born on March 17, 1866 in Bochum, living Lomstraat 3 in Venlo (pension). On August 10, 1944, the Heusden and Hanssen families on the Lottumseweg in Grubbenvorst were unexpectedly searched by the Sicherheitsdienst, led by the infamous Johan Berendsen. At Heusden Mrs. Wolff from Venlo and at Hanssen a young man, Joop Veldman from Amsterdam, was arrested. Both were deported to Westerbork and taken on 3 September 1944 with the last (68th) transport to Auschwitz, where Mrs. Wolff was killed on 6 September 1944.

Amsterdam, 11 February 1922 – Midden-Europa, 15 March 1945 Reached the age of 23 years. Occupation: Typographer.

Joseph Veldman was brought to the police station of Venlo on 10-08-1944 by the Sturmscharfführer of the SD, together with five other persons. Joseph was wounded by a gunshot to the head. After being connected, he was taken to the SD in Arnhem the same day.