The whole ethnicties diverse nationalistic mosaic of Middle-Eastern Europe, has been brutally destroyed in only just one-third part XX age roughly – in years between the end first World War and the halfway point of past century. Guilty of this destruction result nationalistic traditions of Republic Both Nations, was nationalism, which in this part of Europe appeared on decline XIX age, near with seclular delay in relation to West European. Abandoning federational conception, Poland executed astounding act of partition long Republic Both Nations, crossing out in the same way work of common cultural heritage on economic fashion situation at ethnic states.