There are more than seventy-five thousand Stolpersteine, or “stumbling stones,” laid into footpaths across Europe. Collectively, it is the largest decentralized memorial of its kind anywhere in the world. Each four-by-four brass stone is placed at the last known residential or working address of a human being who was murdered by the Nazis. Though most of the stones commemorate people who were Jewish, Roma and Sinti, homosexual, or disabled, there were many other groups persecuted by the Nazis–including Black people. In Germany, four of these stones are dedicated to Black…