Ryahovets & Samovodene: Medieval Bulgaria

The samples derive from the Veliko Tarnovo hinterland — the fortified hill of Ryahovets near Gorna Oryahovitsa and the settlement area of Samovodene. Archaeological investigation in this corridor documents a long habitational sequence through the early Middle Ages into the high medieval period. Historical processes relevant to these dates include the consolidation of medieval Bulgarian polities and later the rise of the Second Bulgarian Empire after 1185 CE.

Archaeological data indicates that sites like Ryahovets functioned as fortified strongpoints and local centers of control, while villages such as Samovodene anchored market and craft activities along river valleys. Limited evidence suggests reuse of earlier fortifications and continuity of local occupation rather than wholesale replacement. Radiocarbon-calibrated contexts and stratigraphic data place the dated human remains securely in the window 889–1250 CE, but taphonomic disturbance and incomplete excavation records mean specific depositional histories are often fragmentary.

Because only three genetic samples are available, any narrative about population origins must be cautious. These remains give a narrow but valuable snapshot of maternal lineages present in the Veliko Tarnovo region during a period of political realignment and sustained regional connectivity via trade and pilgrimage.

All three individuals analyzed from Ryahovets and Samovodene carry mitochondrial haplogroup U. Haplogroup U is an ancient and diverse maternal lineage found across Europe and parts of West Eurasia; its presence in medieval Bulgaria is consistent with longstanding maternal lineages that trace back into the European Neolithic and earlier Hunter-Gatherer ancestries, though precise subclade resolution is necessary to distinguish deep versus more recent contributions.

No Y-chromosome (paternal) haplogroup is reported for these samples, so statements about male-line ancestry, migrations, or elite continuity cannot be made from this dataset. Archaeogenetic interpretation must also account for the small sample size: with n = 3 (below 10), any frequency-based conclusions are preliminary and potentially biased by the burial contexts sampled.

That said, the detection of mtDNA U in all three samples can be read as a signal of maternal continuity or the survival of pan-European maternal lineages in the Veliko Tarnovo region during 889–1250 CE. This pattern does not exclude genetic influx from Slavic, Balkan, Byzantine, or steppe-associated groups during the medieval period; larger, genome-wide datasets would be required to model admixture, sex-biased migration, and demographic change robustly. Future sampling should aim for broader spatial coverage, Y-DNA recovery, and autosomal data to resolve these questions.