Session 4: Natural and Constructed Environment: The Frontiers Abstracts of Session Papers Thursday 2023-04-27 | 14:30 | 14:50 Political Disintegration and Cultural Hybridity in Balkan Liminal Lands in the 7th-8th Centuries Alexander Sarandis Thursday 2023-04-27 | 14:50 | 15:10 Temporal Borders and Permanent Liminalities: Viewing the First Century of the Islamic-Byzantine Frontier as a Chronological Inflection Point. Asa Eger Thursday 2023-04-27 | 15:10 | 15:30 Discussion