MIROSŁAW J. LESZKA is full professor in the Department of Byzantine History, Faculty of Philosophy and History, University of Łódź. His scholarly interests include imperial power in the early and middle Byzantine periods, the role of women at the court in Constantinople, and especially the history of Bulgaria (seventh- to eleventh-century). He is the author or coauthor of eight books as well as over 160 articles and reviews.
KIRIŁ MARINOW is an adjunct in the Department of Byzantine History in the Faculty of Philosophy and History at the University of Łódź. He specializes in historical geography and geopolitics of the medieval Balkans, Byzantine military history, and history of medieval Bulgaria, especially its relations with the Byzantine Empire. He has authored or coauthored over seventy multilingual publications on these subjects.