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.

Blanche Levie was born in Paramaribo 29 March 1896 and died in Sobibor, 11 June 1943  Reached the age of 47 years. The daughter of Juda Levie and Grace Comperts.  She was deported at a later time than her husband. Her last address was Deurloostraat 104hs in Amsterdam.

Jacob Machiel Taijtelbaum was born in Paramaribo, 18 January 1896 and died in Auschwitz, 1 October 1942. Reached the age of 46 years. He was a bank clerk.  The son of Samuel Isay Taytelbaum and Selena Meriam de Vries.

Jacob Machiel Taijtelbaum and Blanche Levie married in 1929 in Amsterdam.  They emigrated from New York to Amsterdam in 1934. The couple settled at Amstelkade 93. Three years later, in 1937, their home address became Kade A 9 in Veere, Zeeland. During the war, in 1942, they were probably forced to move back to Amsterdam.

Emil Thalmann was born in Ichenhausen, 29 March 1892 and died in Auschwitz, 30 October 1944. He reached the age of 52 years.

Martha Sophie Thalmann-Wolfsheimer was born in Pirmasens, 25 July 1896 and died in Auschwitz, 30 October 1944. She reached the age of 48 years.

They both also have a stolperstein in Den Bosch.