A new study— published in Current Biology by a team of researchers at Harvard University and the Archaeological Park of Pompeii in Naples, Italy—asserts that ancient DNA taken from some of the victims challenges stories long told about those particular Pompeii citizens.

In the ruins of Pompeii, visitors aren’t only able to see the houses, frescos and artifacts of the ancient city’s people. They can also “see” the people themselves: plaster casts of Pompeii citizens’ burned bodies,

This new study probed the DNA evidence that has been taken from some of these bodies. The team used the same strontium isotopes that were used to date the DNA samples to get a better understanding of the diversity and origins of Pompeii’s residents.