On May 22, 1860, Moritz Poppelauer (1824-1880) founded the bookstore M. Poppelauer and soon expanded it to include a publishing house. After his death, the business remained in the family and was continued from 1894 by his son-in-law Jacob Saenger, who died on February 14, 1939, eight weeks after the Nazis closed the business. The internationally known bookstore with an attached antiquarian bookshop specialized in Hebraica and Judaica and also sold Jewish ritual items, especially on the holidays.

Dr.Siegfried Goldschmidt was born on February 19, 1877 in Witzenhausen. The parents were the merchant Hirsch Goldschmidt and Julie "Julchen" Goldschmidt, née Spangenthal. After studying medicine and earning his doctorate, he worked as a general practitioner and neurologist in Frankfurt am Main.In 1911, Dr. Siegried Goldschmidt founded the Taunus Sanatorium ( Dr. Goldschmidt Sanatorium ), whose target group was primarily Jewish spa patients in Bad Homburg. The sanatorium ran a kosher kitchen and opened its own synagogue in the spa building in 1928. Dr.

In the Berlin address book from 1899, the following entry can be found: Löwenberg S. E., General Agency of " Providentia " für Lebens - und Unfall Abtheilung, SW Lindenstraße 59, apartment Hagelberger Straße 11.