Beirut, Iron Age III — Lebanon_IA3

The Beirut samples labelled Lebanon_IA3 come from the Iron Age III horizon of the Levant (749–330 BCE), a period when coastal cities such as Beirut were hubs of craft production, trade, and cultural exchange. Archaeological excavations in and around Beirut reveal layered occupation: domestic architecture, imported ceramics, amphorae linked to Mediterranean exchange, and mortuary contexts that speak to both local tradition and external influence.

Archaeological data indicates continuity with earlier Bronze Age Levantine populations alongside increasing interaction with Phoenician maritime networks. This era is characterized by urban resilience after regional upheavals and the expansion of long-distance trade that reached Egypt, Cyprus, and the central Mediterranean. The material record suggests a city oriented toward the sea—salt-lapped harbors, ship timber, and imported wares—while still rooted in Levantine craft and foodways.

Limited evidence suggests that cultural identity in Iron Age Beirut was plural and adaptive: local religious practices and burial customs coexisted with imported objects and stylistic motifs. Genetics now provides a second line of evidence that can test whether these visible contacts also reshaped ancestry profiles. As with all single-site studies, interpretations must be balanced against the patchy nature of excavation contexts and the small sample pool.

Ten genomes from Beirut (Lebanon_IA3) provide a first glimpse into Iron Age III ancestry in the city. Among Y-chromosome results, haplogroup J appears most frequently (4 of the male-associated profiles), with single observations of G, H, and I. Mitochondrial DNA is dominated by haplogroup T (4), with R (2), W6 (1), U1a (1), and I (1) also present. Not all individuals produced complete Y or mtDNA calls; some samples were unassigned or low coverage.

These patterns align with archaeological expectations: haplogroup J is common across the Near East and is consistent with local Levantine paternal continuity. The presence of G, H, and I—lineages that have broader distributions, including in Anatolia, the Caucasus, and parts of Europe—may reflect the long-distance maritime and continental contacts evident archaeologically, or they may represent low-frequency local diversity. Maternal lineages (T and R) are likewise widespread in West Eurasia and the Near East; their prominence here points toward continuity with regional maternal gene pools while leaving room for incoming maternal inputs.

Importantly, with only 10 samples, genetic conclusions are preliminary. The dataset suggests a mosaic of predominantly Levantine ancestry with detectable connections beyond the immediate region, mirroring Beirut's role as a trading entrepôt. Future, larger datasets and genome-wide analyses will be needed to quantify admixture proportions, sex-biased mobility, and temporal change through the Iron Age.