The publication offered to the reader is dedicated to the rich and eventful history of the Orthodox Churches of South-East Europe in the first decade after the end of the Second World War. These years became noticeable in the history of a number of Local Orthodox Churches of the Balkan Peninsula. Most of them: Serbian, Bulgarian, Romanian, Albanian Churches were forced to exist in the conditions of the emerging socialist regimes and experienced various restrictions, and sometimes even persecution. In the second half of the 1940s. there was a struggle for leadership in world Orthodoxy between the Constantinople and Moscow Patriarchates; in the 1950s The Bulgarian Church acquired the status of Patriarchate; A new autocephalous Orthodox Church, the Czechoslovak Church, arose near the Balkans. In the first post-war decade, a prominent place was occupied by the relations of the Orthodox Churches of South-Eastern Europe with the Russian Church, to which special attention was paid in the work. Moreover, while the Moscow Patriarchate has significantly strengthened its influence and moved to a leading position in the Orthodox world, the Russian emigration, which previously played an important role in the development of church life in a number of countries, has largely lost it. The monograph is based on rich archival sources, in particular, materials from Bulgarian, Serbian, Greek, German, American, Russian and other archives. The book is intended for historians, clergy and anyone interested in the history of Christianity. The publishing layout is saved in PDF A4 format.