The present museum building, purchased in January 1982, is the former Port Washington Public Library. Within thirty rooms, the building houses the Center for Military Studies Annex, fifteen exhibit galleries, a research library, the Archacki Archives, a lecture hall/ performance hall, gift shop, reception area, offices and storage areas.

The museum is a unique educational resource designed to communicate to visitors the history, culture and ‘folk arts” of the Polish people and diaspora in the United States. It embodies both physical exhibits and programs to bring the story of their heritage to life. Moreover it serves as a bridge between generations and cultures in presenting examples of outstanding contributions to humanity that are timeless in the values they portray.