The Ferdinand Gamburg Lodge LXXII No. 654 U.O.B. was the Hanau lodge of the Independent Order B'nai B'rith. On January 16, 1910, lodge brothers founded the lodge in honor of the late benefactor. In 1937, the Lodge was dissolved.

Hausvogteiplatz was considered the center of Berlin's fashion world in the 1920s. Erdmannsdorfer Büstenfabrikate GmbH was first mentioned in the Berlin address books in 1911. The company moved several times around Hausvogteiplatz until 1938. However, for the longest time it was located at Seydelstraße 8/9. The founder of the company was Adolf Samson, under whose management mannequins were manufactured. The Büro and exhibition rooms were located in Berlin, while production took place in the Upper Silesian town of Erdmannsdorf (today: Mysłakowice in Poland).

With the construction of the new theater at Kommandantenstr. 57 in 1906, comedians and actors Anton and Donat (née David) Herrnfeld realized their ideas of their own theater. Donat wrote the plays on bourgeois themes of morality and honor in Jewish families. The success of the theater was also due to its family character. This existed in the interaction with the audience, but also in the operational structure. The wives sat at the box office, sisters and children also played on the stage, the mother cooked in the theater kitchen.

The history of the Antiquarian Bookshop Emanuel Mai is based on three generations of a Jewish family: the founder Emanuel Mai (née Maier, 1812-1897), his son Max Mai (1842-1909) and his grandson Ulrich Mai (1873-1964).

The large Kaufhof building between Hohe Straße and Schildergasse in Cologne's city center catches the eye even as you pass by. Less obvious, however, is the building's history, which dates back to 1891, when Jewish merchant Leonhard Tietz set up his business in Cologne.