About the book: 1981 / The monograph examines political and economic relationships in the Eastern Mediterranean in the 13th–15th centuries, examines the connections of the Trebizond Empire with the Italian trading republics, the Latin Empire, England, France, etc. For the first time in Russian historiography, the international significance of the State of Trebizond in the Middle Ages, its role as a mediator between European powers and the countries of the Middle East are being studied..