Overview
- The Nature study, published Wednesday, analyzed 258 ancient genomes from row‑grave cemeteries in Bavaria and Hesse, including 112 from Altheim.
- Genomes show people with northern‑European ancestry were already on Roman frontier lands for generations, living apart under imperial rules that included marriage limits tied to land grants.
- Family trees reconstructed from the DNA reveal swift intermarriage right after the Western Empire’s collapse in 476, as legal and social barriers fell between northern‑ancestry groups and diverse Roman communities.
- Researchers also detect continued north‑to‑south movement through the 500s, producing by the 7th century a genetic profile that closely matches people in central Europe today.
- Burial and bone evidence points to monogamous nuclear families, strict avoidance of close‑kin unions, and relatives buried together, reflecting late‑Roman Christian norms, with life expectancy near 40 for women and 43 for men.