He specialises in the history of the Caucasian region, in the area of the Eastern Church and late Antique Christianity. He is the author of many scientific publications.
He is the founder of "Pro Georgia. Journal of Kartvelological Studies" and its editor in chief . He is the member of the international comission of the Heritage of St. George Peradze.
Since 2002 r. he organises Annual St. George Peradze International Caucasologist Sessions. In 2003 he was in Greece (The Athos Mountain), where he did a library and archival query; at the Columbia University and at the Dumbarton Oaks Center for Byzantine Studies in Washington.
He taught the history of the Caucasian region i.a. at European univeristies ( Humboldt, Santiago de Compostela, Halle-Wittenberg) and at the Iwane Dżawachiszwili University in Tbilisi. He was awarded the title of doctor honoris causa of the St. George Peradze University (2009).