Article · Wikipedia archive · Last revised Aug 6, 2026

Mavroneri

Mavronéri is a river identified with the River Styx of Greek mythology according to Hesiod’s description in Theogony. It is located near Nonakris in the Aroania Mountains of Achaia on the Peloponnesian peninsula. Its waters contain a significant amount of Calicheamicin, a dangerous compound produced by bacteria. Stanford University scientists Antoinette Hayes and Adrienne Mayor speculate that the waters of the Mavronéri were used to poison Alexander the Great in 323 BCE.

Last revised
Aug 6, 2026
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37°59′02″N 22°12′18″E / 37.984°N 22.205°E / 37.984; 22.205

Mavroneri
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Mavronéri (Greek: “Black Water”) is a river identified with the River Styx of Greek mythology according to Hesiod’s description in Theogony. It is located near Nonakris in the Aroania Mountains of Achaia on the Peloponnesian peninsula. Its waters contain a significant amount of Calicheamicin, a dangerous compound produced by bacteria. Stanford University scientists Antoinette Hayes and Adrienne Mayor speculate that the waters of the Mavronéri were used to poison Alexander the Great in 323 BCE.1

References

References

  1. Nick Squires (August 3, 2010). "Alexander the Great poisoned by the River Styx". telegraph.co.uk. Retrieved August 10, 2017. 'It is extremely toxic,' said Antoinette Hayes, co-author of the Stanford University research paper and a toxicologist at Pfizer Research in the US.{{cite web}}: CS1 maint: deprecated archival service (link)