The Slavs and the Old Prussians. Poland in the Early Medieval Period / Славяне и Древние Пруссы. Польша в период Раннего Средневековья.: Poland regained independence in 1918; Polish archaeology regained it too: departments of archaeology were established at principal universities - in Lwow (Lviv), Krakow, Poznan, Wilno (Vilnius) and Warszawa, with at their head, professors most of whom h