The collection includes selected materials from archaeological research conducted by the IAE PAS. It contains the complete documentation from research of an early medieval city centre in Kalisz. There are also materials from excavations in Szczecin, Wolin and Sandomierz. They were part of extensive historical and archaeological studies on the early Middle Ages of Polish lands, carried out as part of the celebration of the Millennium of the Polish State (Millennium Poloniae).There are is also documentation of sites with a much older chronology, a multi-phase open settlement in Grzybiany. It also includes photographic materials from Wilczyce, Orońsko or Wyszogród sites. Access to some of these materials is restricted.