The publication "For the Unity of the Church" contains the original letter of Metropolitan Daniel of Vidin to His Holiness Patriarch Neophyte of Bulgaria and members of the Holy Synod of the Bulgarian Orthodox Church in Bulgarian, as well as its translations into Russian, English and Greek, which were sent to the Primates and hierarchs of a number of Local Orthodox Churches: the Patriarchates of Alexandria, Jerusalem, Romania, as well as the Cypriot, Greek and Albanian Orthodox Churches.
In its genre, the letter is a brief historical and canonical study in which the activities of the Fanar are comprehensively analyzed on the basis of documents on the transfer of the Kiev Metropolitanate to the Moscow Patriarchate in 1686, canonical rules and tomos of the Patriarchate of Constantinople.
In the preface to the book, Metropolitan Hilarion of Volokolamsk, chairman of the Moscow Patriarchate's Department for External Church Relations, emphasizes that "in his work, Metropolitan Daniel shows that the actions of the Patriarchate of Constantinople in Ukraine are a violation of two thousand years of canonical tradition and are caused, among other things, by dogmatic distortions associated with the denial of the principle of conciliarity in the Orthodox Church and the proclamation of its head — instead of Jesus Christ — the Patriarch of Constantinople."
The book, prepared by the Publishing House "Cognition" in cooperation with the Foundation for the Support of Christian Culture and Heritage, is the third in a series of ten books devoted to international and inter—Orthodox relations. Among the authors of the nearest publications are Bishop Anthony of Moravica (Serbian Orthodox Church), Protopresbyter Anastasios Gotsopoulos (Greek Orthodox Church) and others.
This letter will undoubtedly go down in the history of the Church. The reason for writing the letter in March 2019 was the discussion that arose in the Bulgarian Orthodox Church in connection with the tragic situation in Ukraine, the intervention of the Patriarchate of Constantinople in the Ukrainian church issue, the formation of the so-called Orthodox Church of Ukraine (PCU) with its participation from schismatics and the granting of the newly created structure of the "tomos of autocephaly".