The Museum’s collection consists of archaeological finds from the Mazovian region of Poland, dating from the Palaeolithic up to the Modern Age. The bulk of the collection are objects discovered during the Museum’s exploration of the Mazovian Centre of Metallurgy (settlements at Biskupice, Milanówek-Falęcin, Brwinów and Reguły) and areas adjacent to Mazovia (settlements at Kraśnicza Wola and Młochów). An important element are photographs taken as part of PAR (Polish Archaeological Record) at close to 4,000 sites – documenting surface surveys carried out by Stefan Woyda and his co-workers. The Museum also holds artefacts from excavations carried out by various institutions and private entities, handed over to the Museum by the Heritage Conservator of the Mazovian Voivodship. Most of these objects come from western Mazovia (settlements at Regów, Grodzisk Mazowiecki, cemetery at Stare Babice and Cząstkowo Polskie) as well as other parts of the region (cemeteries at Kleszewo, Łajskie and Lemany) dated to the period of the Mazovian Centre of Metallurgy’s operation.