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The Enigma Cipher Center — a place with interactive, multimedia exposition dedicated to the Enigma encryption machine and the three cryptologists: Marian Rejewski, Henryk Zygalski and Jerzy Rozycki, located in the former Collegium Historicum building, presently Collegium Martineum at the corner of Swiety Marcin and Tadeusz Kosciuszko streets in Poznan. Originally the building was a headquarters of the Regional Committee of the Polish United Workers Party. Later it was used by the Adam Mickiewicz University.

The Enigma Cipher Center is a brand of the Poznan Heritage Center.

Description
The Center is a joint venture of the city of Poznan and the University of Adam Mickiewicz. The implementation of the project was entrusted to three companies: Atrem S.A, Eugeniusz Dota Construction Company and New Amsterdam Sp. z o.o., which won the construction tender announced in June 2019. The idea to create such a place, originally referred to as The Enigma Museum was introduced by a radio journalist Szymon Mazur.

The construction of the center was implemented as part of the "Preservation, protection, promotion and development of natural and cultural heritage of the Wielkopolska Regional Operational Program between 2014—2020, in cooperation with the Adam Mickiewicz University. The facility was open on September 2021. The general manager is Piotr Bojarski.

History
The current location of the center was originally occupied by the building of the military headquarters of the 5th Army Corpus of the German Empire (Königliche Intendantur des V Armeekorpsn) built between 1843—1847.

After World War I the headquarters of the Wielkopolska 14th Infantry Division was placed there. Part of the rooms were used by the Poznan branch the general staff of the Polish army Cipher Bureau, where three cryptologists — Marian Rejewski, Henryk Zygalski and Jerzy Różycki were employed.

Following the outbreak of World War II the building was used by the German Army. After the war the building had suffered serious damages and in 1948 the decision was made not to rebuild it but to construct a new building to house the headquarters of the Polish United Workers Party authorities which was located here till 1990. Subsequently the building was handed over to the Adam Mickiewicz University to accommodate the Department of History which existed there till 2015 until its relocation to the Morasko campus.