The volcano of the Solfatara was formed about four thousand years ago and therefore slightly later than the formation of the crater at Agnano, while the crater in the area of the Astroni was still being formed. The Roman historian and geographer, Strabone,

in his “Geographia”, mentioned the subject calling them “Forum Vulcani”.

                             Inside the Solfatara- G.Hoefnagel – XV1 century

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