University of Poznań donates the building of the old Collegium Historicum for the construction of the Enigma Museum. The German cipher was broken by Marian Rejewski, Henryk Zygalski and Jerzy Różycki, who majored from mathematics at the Poznań university.

In 1932, they learned the secret of the German electromechanical Enigma encryption machine operations. They did it with use of mathematical methods. Until that time only linguistic methods had been used in cryptology.

Originally, Enigma was supposed to serve for the purposes of secreting business correspondence. However, it was used in the German armed forces. The three Polish mathematicians designed a copy of the encryption machine. Copies of this device were made at the AVA Radio Production Station in Warsaw. In the summer of 1939, the Polish military authorities sent copies of the machine to France and the United Kingdom along with information on the broken code.