The Slavs and the Old Prussians. Poland in the Early Medieval Period / Славяне и Древние Пруссы. Польша в период Раннего Средневековья.: Even so, during the same period as the Millennial Project a new idea on the ethnic origin of Slavs was put forward by Kazimierz Moszyriski, eminent ethnographer from Jagiellonian University in Krakow. Using evidence from ethnography and linguistics Moszyr