West Byzantine Anatolia (400–800 CE)

Between the collapse of the unified Roman world and the consolidation of medieval polities, west Anatolia around Iznik (ancient Nicaea) and Bursa formed a theater of cultural continuity and change. Archaeological layers at sites such as Ilıpınar (Marmara. Bursa. Orhangazi) and the basilica complexes at Yenişehirkapı and Basilica (Marmara. İznik) preserve late Roman and early Byzantine architecture, Christian burial grounds, and material ties to provincial trade networks.

Archaeological data indicates continuity in settlement patterns and local crafts, while also recording new administrative and religious expressions of a Christianized empire. Material culture—ceramics, building phases, and funerary types—suggests populations rooted in earlier Roman provincial communities with interactions across the Marmara corridor. Limited genetic sampling (13 individuals) provides a nascent biological dimension: maternal lineages documented here overlap broadly with known Mediterranean and West Eurasian haplogroups, consistent with long-standing exchange and mobility in the region.

Taken together, the picture is of communities that retained local ancestry and lifeways while participating in the shifting political and economic currents of Late Antiquity. However, these conclusions are provisional: the sample set is geographically focused and modest in size, and further sampling is needed to resolve the finer-scale dynamics of migration and continuity.

Genetic sampling from 13 individuals dated to 400–800 CE at Ilıpınar and Iznik offers an initial look at maternal ancestry in West Byzantine Anatolia. Mitochondrial haplogroups recovered include T (3 samples), H (2), J (1), U (1), and a lineage labeled H87 (1). These matrilineal markers are commonly observed across the Mediterranean and West Eurasia: H and T are frequent in European and Anatolian populations, J often appears in Near Eastern and Mediterranean contexts, and U is widespread in West Eurasia.

Important caveats shape interpretation. First, mtDNA data appear to be available for a subset of the 13 individuals (the counts above sum to fewer than 13), so maternal-line inferences are based on limited numbers and must be considered preliminary. Second, no common Y-DNA haplogroups were reported for this set, leaving male-line dynamics unresolved. Third, these haplogroups reflect deep, widespread maternal ancestries rather than recent, specific migrations; they are consistent with long-standing genetic continuity and regional connectivity rather than evidence for a single migratory event.

Archaeogenetic integration—combining genome-wide data, isotopes, and broader regional sampling—would better quantify local continuity, incoming gene flow, and kinship patterns. For now, the genetic signal aligns with an Anatolian population shaped by Mediterranean and West Eurasian maternal lineages, embedded in a late antique sociocultural landscape.