Volume XV presents a collection of articles based on the international scientific online conference Х Drynovsky readings “The Balkans in international relations: from late Antiquity to the era of globalization” held by V. N. Karazin Kharkiv National University, the Institute of Ukraine History of the National Academy of Sciences of Ukraine, Commission of Historians of Ukraine and Bulgaria, Scientific Society of History of Diplomacy and International Relations, the Institute of Balkan Studies with the Center of Fracology and the Institute of Historical Studies of the Bulgarian Academy of Sciences in Kharkiv in 2021. In addition to the thematic chapters, it presents traditional for “Drinovsky sbornikˮ sections: “Source studies and historiography”, “Reviewsˮ, “Scientific Lifeˮ, “In memoriam”. The edition is intended professional historians, students of humanities and wide range of readers.