Sebastian Kheml, Tomáš Glomb, and Aleš Chalupa employed spatial analysis to uncover a possible link between malaria and healing cults in Roman Italy

13 May 2026

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A new study published in Open Archaeology by Sebastian Kheml, Tomáš Glomb, and Aleš Chalupa examines how malaria shaped religious life in the Roman Empire. Combining traditional historiography with Geographic Information System (GIS) analysis, the authors investigated whether the distribution of ancient healing cults dedicated to Asclepius and Apollo correlates spatially with malaria-prone zones in Roman Italy, Sicily, and Sardinia. Using a digitized version of the 19th-century Torelli map of pre-eradication malaria alongside epigraphic data from the Latin Inscriptions in Space and Time (LIST) dataset, the team compared inscriptions for the healing deities with those of seven other Roman gods, including Jupiter, Minerva, Mercury, and Hercules.

The results provide significant support for the hypothesis that malaria risk was a contributing factor in the spread of healing cults. Provinces and regions with larger malaria-prone areas, such as Latium et Campania, Etruria, and Sardinia, show statistically significant higher proportions of inscriptions dedicated to Asclepius and Apollo. A spatial proximity analysis further revealed that half of all locations with Asclepius inscriptions lay within roughly 2.4 km of the nearest malaria-prone zone, considerably closer than any other deity examined. The authors interpret these patterns as evidence that endemic malaria likely influenced the religious preferences of Roman communities, illustrating how environmental pressures shaped lived religion in antiquity.

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Article in Open Archaeology Article in Magazín M


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