In the real book the American historian, slavist and византист Фрэнсис Дворник, analyses events taking place in Central and East Europe in X - XI вв., when national interests of the living on these territories Slavic tribes were formed. Born in heathen Rome and with readiness accepted by Rome christian idea of creation in Central europe of the strong Slavic state comparable with Germany, appeared unusually of great vitality. Her it was tried to incarnate Пясты, Пржемыслиды, Luxemburg, Анжуйцы, Ягеллоны and already in XVII of century Габсбурги. And although in course of time an empire fell to pieces to pieces, foundation of the states of continental Europe was stopped up exactly in these years.