May 12, 1889
Born in Frankfurt am Main (Germany).
Studies art history in Heidelberg (Germany).
Leaves for New York to gain work experience at Macy’s department store and in a bank.
Otto is drafted into the military.
Otto is promoted to the rank of army lieutenant.
May 12, 1925
Otto marries Edith Holländer in Aachen (Germany).
February 16, 1926
Margot Frank is born.
June 12, 1929
Anne Frank is born.
Edith, Margot and Anne stay with their grandmother in Aachen. Otto travels on to Amsterdam.
Otto sets up the Opekta company and becomes director.
The Pectacon company is set up.
Opekta and Pectacon move to Prinsengracht 263.
Jews are forbidden to own their own businesses, so Otto appoints Mr Kleiman and Mr Kugler as directors, but remains in charge behind the scenes.
July 6, 1942
The Frank family goes into hiding.
June 25, 1947
Otto gets the diary published in the Netherlands.
Otto moves to Basel (Switzerland).
November 10, 1953
Otto marries Elfriede (Fritzi) Markovits.
May 3, 1960
Otto attends the opening of the Anne Frank House.
August 19, 1980
Otto dies in Basel (Switzerland).