The Frankfurter Sparkasse and the Polytechnische Gesellschaft commissioned the Fritz-Bauer-Institut to work through their history from 1933 to 1945.
Both institutions announced this on Tuesday.
Strictly speaking, it is about three institutions, because at that time Frankfurt still had two savings banks, the Frankfurter Sparkasse founded by the Polytechnic Society in 1822 and the Municipal Savings Bank.
They didn't merge until 1989.
The study is to appear independently of the Festschrift, for which the Bochum historian Dieter Ziegler will now deal with the years of National Socialism after there had been a dispute over an initial manuscript written by the Frankfurt historian Ralf Roth.
Robbery of real estate
The chairman of the Sparkasse, Ingo Wiedemeier, said on Tuesday that it was important for the institute to clarify how Jewish employees and customers and their assets were treated at the time.
The Polytechnic Society would like the Fritz Bauer Institute to deal with the fate of the Jewish members who were expelled at the time.
Sybille Steinbacher, head of the Fritz Bauer Institute, pointed out that this institution is currently researching "Aryanization" in Frankfurt, particularly the theft of real estate belonging to Jews.