Otto Zoff was born in Prague on April 9, 1890.His father was a Catholic and came from ÖAustria.His mother was Jewish and came from Czechoslovakia.At the age of two, Otto Zoff´s family moved to ÖAustria.In Vienna, Otto Zoff studied art history and archäology,literature, and history.In 1914.

In the address book of the city of Munich 1923, the following entries can be found: Sonder Sali, Kaufmann,Andréestr.2 T - Sonder Sali, Farbenfabrik, Öl, Fett- und Lackhandlung. Business. Andréest.2 T, warehouse Donnersbergerstr. 9b ( Inh. Sali Sonder u. Julius Stern ). Sali Sonder was married to Karoline Stern, born on 18.02.1884 in Reckendorf, district Bamberg. Her brother Julius Stern and Saly Sonder were partners of Sali Sonder OHG.

In the Berlin address book - edition 1910 is the following entry - Adolf Maaß, factory antiseptic articles, SW 68, Alte Jakobstr.109, H. II. T. I. 9405 (BK) Inh. Adolf u. Richard Maaß

In the available sources there are no references to the exact date of the foundation of the old Jüdische cemetery in Hülchrath. A cadastral map from 1811 describes the plot as "Old Jüden Kirchhof". Due to the high groundwater level, the land was repeatedly flooded. 1900 at the end of today's Jahnstraße the new Jüdische cemetery was created, on which 1907 the first burial took place.

Residential and business house of the Wolff brothers. 1884 reconstruction of the building with a representative staircase to the street. Special feature is a hall with ceiling painting ("Hall of Angels").
Building is classified as a single monument.