In addition, beginning in 1985, there are "Berliner Gedenktafel" on buildings around the city (https://en.wikipedia.org/wiki/Berlin_memorial_plaque). This one--https://commons.wikimedia.org/wiki/File:Gedenktafel_Kurt_Singer.jpg--is at Mommsenstr. 56, next to a building where my father lived 1931-33, with a good view of Nazi demonstrations. At the time that the Gedenktafel was erected, his death at Theresienstadt on 7 Feb. 1944 wasn't known. When you see this quite large plaque, you "stumble" in your mind.
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Carol Sicherman
Oakland,CA