Mount Vesuvius ( /vɪˈsuːviəs/; Italian: Monte Vesuvio [ˈmonte veˈzuːvjo]; Neapolitan: Vesuvio; Latin: Mons Vesuvius [mõːs wɛˈsʊwɪ. ʊs]; also Vesevus or Vesaevus in some Roman sources) is a somma-stratovolcano located on the Gulf of Naples in Campania, Italy, about 9 km (5. 6 mi) east of Naples and a short distance from the shore. It is one of several volcanoes which form the Campanian volcanic arc. Vesuvius consists of a large cone partially encircled by the steep rim of a summit caldera caused by the collapse of an earlier and originally much higher structure.