The monograph is devoted to the participation of the Volyn gentry in religious movements of the late XVI - first half of the XVII century. In particular, the main attention is paid to its social, religious and founding activities within the four Christian churches represented in Volhynia at that time - Orthodox, Uniate, Roman Catholic and Protestant. The work also explores the problems of religious conflicts, issues of natsієtvorennya of the Ukrainian people (on the example of the gentry state of the Volyn Voivodeship).