https://www.npr.org/2023/07/06/ [login to see] /munich-synagogue-hitler-demolished-found-river
After Adolf Hitler ordered Munich's main synagogue to be demolished in June 1938, no one knew what became of the rubble — until last week. Construction crews working on a river dam unearthed some 150 tons of stone columns and a tablet bearing the Ten Commandments in Hebrew.
Bernhard Purin, the director of the Jewish Museum Munich, says they were found 7 or 8 miles away from the synagogue site, which was converted into a parking lot and now houses a department store and a monument to the original building.
The workers contacted German heritage protection authorities and then Purin, an expert on synagogues who said it quickly became clear to him where the rubble had come from.