Katyn Museum is there to commemorate a painful episode of Polish history which took place during the World War II when over a twenty thousands of Polish military officers and state officials were brutally murdered by the Soviet Secret Police.

Katyn Museum lies the southern part of the fort – the Warsaw Citadel consisting of three historical buildings. The whole foundation is a park with symbolic Katyn Forest in the centre of it. The entrance is located at Nowomiejska Gate, the extension of the Old Town route. The museum exhibition has been designed on two levels of Kaponiere – old artillery. The third building is the arcade gunrest building, which consists of five glassed arcades which locate plaques with the names of the murdered officers.