At one point, the family lived over a Jewish-owned bookstore. They were captive witnesses when the Gestapo made a late-night raid burning not only the store's contents, but also burned the store's owners alive atop the pile of burning books.
During their time in that location, the family lived above a Jewish-owned bookstore. The Gestapo raided the store during the night, destroying everything inside and setting the owners on fire while they were still alive.