БЪЛГАРИТЕ, РУСИЯ И ПРАВОСЛАВНИЯТ ИЗТОК ПРЕЗ XV–XVII ВЕК. КЪМ ИСТОРИЯТА НА ЦЪРКОВНО-ПОЛИТИЧЕСКИТЕ ВРЪЗКИ. /BULGARIANS, RUSSIA AND THE ORTHODOX EAST IN THE XV-XVII CENTURIES. TO THE HISTORY OF CHURCH-POLITICAL RELATIONS.

This book provides information about the church-political relations between Russia, the Orthodox East and the Bulgarian lands during the period XV–XVII centuries.
The information is presented in four chapters.
The first of them essentially examines the influence of Tarnovo Bulgaria on the Balkans and in the Russian lands, as well as the historical preconditions for this phenomenon.
The second chapter presents information about the processes in the Russian lands in the XV–XVII centuries and the attitude of the representatives of the Orthodox East towards Russia during this period.
The information presented in the third chapter concerns the activities of the Russians rulers for the popularization of Russia among the peoples of the Balkans peninsula and Russian aid to the Orthodox East during the period under review. Information about the visits of clergymen is also on display in the north, who are responding there to ask the Russian authorities for material assistance and political support. The last one
paragraph of the chapter sheds light on the activities of the Ambassador
a story that for a long time administered the visits of representatives of the Orthodox East in Russia. 
In the fourth Chapter presents information on political agents and informants of Russian authorities from the Orthodox East and the Bulgarian lands in the period under consideration. The second paragraph provides information on the activity in this direction from the middle of the XVII century of the Metropolitan of Tarnovo Dionysius II,
which for at least a decade has served as informant of the Russian authorities about the events in the Ottoman Empire and in particular about the war between the empire and Venice for the island of Crete (1645-1669).
As applications in the form of facsimiles, segmented
text of the language in which they are prepared and translation into Bulgarian are presented three archival units from F. 52 Russia's relations with Greece at RGADA (Российский Государственный Архив Древних Актов). The documents date from the middle of the 17th century. The first archival unit contains files prepared in the Russian clerical language from the 17th century.
interesting historical sources that provide valuable information
for the order in the administration of the representatives of the Orthodox
east in the Russian lands in the middle of the century. The other two documents are letters written in Greek and addressed under a foreign name wounds from Metropolitan Dionysius II of Tarnovo to Russian Tsar Alexei Mikhailovich.