Herbert de Clairvox
Herbert de Clairvox was a 12th-century Benedictine monk known for his writings on natural phenomena and theological concepts. He gained notoriety for comparing Iceland's Hekla volcano to Mount Etna in Sicily, suggesting that it was a more powerful and fearsome site, which contributed to the belief that it was a gateway to hell.
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Herbert de Clairvox claimed in 1180 that Hekla was stronger than Mount Etna in Italy.
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