A new genetic study demands reexamination of the identities of, and relationships among, some of the people buried and preserved in the ancient Roman city of Pompeii.
An international team led by scientists at Harvard Medical School, the University of Florence, and the Max Planck Institute for Evolutionary Anthropology analyzed DNA from the remains of five people who died in the eruption of Mt. Vesuvius in 79 CE and were cast in plaster nearly two millennia later. Researchers retrieved the DNA in conjunction with the Archaeological Park of Pompeii during restoration of 86 damaged casts in 2015.
The results, published Nov. 7 in Current Biology, reveal that some of the stories told for decades about the individuals’ sexes and family relationships, which were based on the casts’ physical appearance and other archaeological evidence, are either not correct or not as simple as believed. For example:
- An adult with a golden bracelet and a child on their lap, often interpreted as mother and son or daughter, turned out to be a genetic male and a biologically unrelated child.
- Three of four presumed family members at one site had no genetic ties to one another, at least up to the third degree. (The team wasn’t able to analyze DNA from the remains of the fourth person.)
- Two individuals lying in a position frequently seen as an embrace — previously hypothesized to be sisters, mother and daughter, or lovers — include at least one genetic male, excluding two of the three common interpretations.
“The findings demonstrate the importance of integrating genetic analysis with archaeological and historical information to enrich or correct narratives constructed based on limited evidence,” said study co-senior author Alissa Mittnik, former research fellow in genetics at HMS who is now a group leader at the Max Planck Institute.
The authors note that such narratives often reflect the worldviews and biases of researchers and other storytellers at the time. In the case of the Pompeii individuals, the genetic insights should serve as a caution not to make deductions about characteristics like sex and kinship based on evidence like jewelry and physical proximity.
Further complicating the picture is that the remains themselves had been moved into different positions and the plaster casts likely “creatively restored” in the past, the authors said. Some groups of casts reflect the different aesthetic preferences of the historical periods in which they were made, the researchers noted.
The authors warn against making similar mistakes based on the new DNA findings.
“Instead of establishing new narratives that might also misrepresent these people’s experiences, the genetic results encourage reflection on the dangers of making up stories about gender and family relationships in past societies based on present-day expectations,” said co-senior author David Reich, professor of genetics in the Blavatnik Institute at HMS and professor of human evolutionary biology at Harvard University.
This is true both at Pompeii and at any historic or prehistoric site in the world, Reich added.
The analysis does corroborate previous evidence that ancient Pompeiians largely descended from people who had immigrated from the eastern Mediterranean.
“This underscores the cosmopolitanism of the Roman Empire in this period,” said Reich.
Pompeii Park has included ancient DNA analysis of humans and animals in its study protocols for years, said director Gabriel Zuchtriegel — augmenting other types of data to form a comprehensive, updated interpretation of the site’s archaeological findings and to develop new research methods that advance understanding of the past.
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