This volume brings together the plenary papers presented at the 25th International Congress of Byzantine Studies, reflecting new developments and trends in current research on the Byzantine world and its enduring legacy. Organized into six sections, the studies address multiple aspects of Byzantine history, culture, literature, archaeology, and art. In tune with the overarching theme of the congress, several chapters examine the ways in which Byzantium interacted with and was perceived by others, as well as how Byzantine ideas, culture, and identity were interpreted, adapted, and reimagined in later periods. Together, they illuminate Byzantium’s lasting place in the medieval world and its influence both within and beyond its borders.