Jacob Kabrun Jr.

From September to December 1804 the future philosopher Arthur Schopenhauer gained business experience working for Kabrun's firm.

Kabrun was friends with Schopenhauer's father, a member of another Danzig merchant family.

[2] Kabrun built up and maintained an extensive collection containing books and several thousand valuable drawings, paintings and prints.

By the time that he bequeathed his collection to the city of Danzig[3] it contained 339 oil paintings, 1950 watercolors and drawings, and 10883 engravings and woodcuts.

Kabrun also bequeathed 100000 florins to establish a Business Academy in Danzig.