If you've been to Germany, you might have noticed the small brass blocks embedded in sidewalks to commemorate victims of Nazism. The unique memorial project, launched 20 years ago, has just passed an important milestone.
The small plaques, known as Stolpersteine (stumbling stones or stumbling blocks in English), have been installed in sidewalks in Germany and other countries to preserve the memory of the Nazis' victims. Each stone is engraved with the name, date of birth and fate of an individual, and placed in front of their last voluntary place of residence.
The 70,000th stone bore the name of Willy Zimmerer, a man with a disability who was murdered in 1944 in Hadamar, near Frankfurt. The western German town was home to a psychiatric hospital that was used to exterminate "undesirable" members of society under the Nazis' "euthanasia" program. Nearly 15,000 Germans were murdered there.