The rebuilding of an independent Polish state after the First World War meant, above all, the urgent necessity of unification of three formerly partitioned lands, especially in context of law, economy and administration. This integration process in the Second Republic as a whole, although long and difficult, was successful. Real problems for the state authorities were separatist tendencies and regional antagonisms. The consequences of more than a hundred years of functioning of three partitioned lands within the Prussian (German), Austrian and Russian states resulted in both national and cultural heterogeneity. Interwar Poland was inhabited by a nationally and ethnically diverse population of various faiths. Germans in former Prussian Polan...