Abraham Oppenheim

The eldest son of Salomon Oppenheim, Jr., Simon [de], joined his father's banking house in 1821.

In 1826, Salomon Oppenheim gave his sons Simon and Abraham general power of attorney to continue the banking business.

The brothers transformed their father's commission and exchange house into a major private bank.

Together with Gerson Bleichröder and other bankers, he advised the monarch on financing the Austro-Prussian War of 1866 through government bonds.

The Prussian ruler rejected the plan of Oppenheim and Bleichröder, advocated by Bismarck, to finance the war by privatizing state-owned mines in the Saar.