Pompeii is a partly buried Roman town-city near modern Naples in the Italian region of Campania, in the territory of the comune of Pompei. Along with Herculaneum, its sister city, Pompeii was destroyed and completely buried during a long catastrophic eruption of the volcano Mount Vesuvius spanning two days in 79 AD. The eruption buried Pompeii under 4 to 6 meters of ash and pumice, and it was lost for over 1,500 years before its accidental rediscovery in 1599.