Eastern Catholic Churches are situated between two branches of Christianity, the Eastern and the Roman Catholic. The churches are in full communion with the Roman Catholic Church while at the same time preserving their Eastern traditions inherited from the churches from which they separated. As intermediate churches, Eastern Catholic Churches have been the subject of extreme political pressure, either contested or welcomed by politicians, clergymen and the faithful. This book is a comprehensive survey of the development of all Eastern Catholic Churches in Europe from the inter-war period to the present day. It focuses on the survival of churches during the Cold War period, ecclesiastical contacts between East and West, the evolution of church-state relations, their socio-political influence, and the ways in which these churches act as bridges towards a unified Christianity.