The Józef Piłsudski Museum was established in Sulejówek. The construction of the facility began in the fourth quarter of 2015 and ended in 2020. The total area of this two-storey building will be 10,842 m², while the usable area is 6082 m². The PIG Architekci is responsible for the architectural design of the building, while the general contractor for the investment is PORR from Warsaw. 

General contractor: PORR S. A.