When did cities begin to thrive in Poland? Was it associated with the German colonization in the thirteenth century, or had the Piast developed these centres several hundred years earlier? Prof. Zbyszko Górczak of the Institute of History, A. Mickiewicz University in Poznań, presents contemporary position of Polish historiography.
World War 2 This war fought in Europe, North Africa and Asia started in 1939 with the invasion of Poland by Nazi Germany and ended in 1945 with the dropping of two atomic bombs on Japan. It was the largest armed conflict in history.