Question: The volcano that destroyed the Roman city of Pompeii is located where?

Context paragraphs:
Lupanar (Pompeii): The Lupanar of Pompeii is the most famous brothel in the ruined Roman city of Pompeii.  It is of particular interest for the erotic paintings on its walls.  "Lupanar" is Latin for "brothel".  The Pompeii lupanar is also known as "Lupanare Grande".

Mount Vesuvius: Mount Vesuvius ( ; Italian: "Monte Vesuvio" ] ; Neapolitan: "Vesuvio" ; Latin: "Mons Vesuvius" ] ; also "Vesevus " or "Vesaevus " in some Roman sources) is a somma-stratovolcano located on the Gulf of Naples in Campania, Italy, about 9 km 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.

Amphitheatre of Pompeii: The Amphitheatre of Pompeii is the oldest surviving Roman amphitheatre.  It is located in the ancient Roman city of Pompeii, and was buried by the eruption of Vesuvius in 79 AD, that also buried Pompeii itself and the neighboring town of Herculaneum.

Vesuvius (disambiguation): Vesuvius, also known as Mount Vesuvius, is a volcano in Italy that destroyed the Roman city of Pompeii.

Porta Nigra: The Porta Nigra (Latin for "black gate") is a large Roman city gate in Trier, Germany.  It is today the largest Roman city gate north of the Alps.  It is designated as part of the Roman Monuments, Cathedral of St. Peter and Church of Our Lady in Trier UNESCO World Heritage Site.

Amedeo Maiuri: Amedeo Maiuri (January 7, 1886 - April 7, 1963) was a renowned Italian archaeologist, famous for his archaeological investigations of the Roman city of Pompeii which was destroyed in the eruption of Mount Vesuvius in August of AD 79.

House of Sallust: The House of Sallust is a domus or elite residence in the ancient Roman city of Pompeii.  The oldest parts of the house have been dated to the 4th century BC, but the main expansions were built in the 2nd century BC.  The long history of this structure provides important evidence about the development of elite residences in Pompeii.  The house is located on the east side of the Via Consolare.  It received its modern name from an election notice placed on the facade, recommending Gaius Sallustius for office.  An alternative name is the House of A. Cossus Libanus, from a seal found in the ruins.

Villa of the Mysteries: The Villa of the Mysteries (Italian: "Villa dei Misteri" ) is a well-preserved suburban Roman villa on the outskirts of Pompeii, southern Italy, famous for the series of frescos in one room, which are usually thought to show the initiation of a young woman into a Greco-Roman mystery cult.  These are now probably the best known of the relatively rare survivals of Ancient Roman painting.  Like the rest of the Roman city of Pompeii, the villa was buried in the eruption of Mount Vesuvius in 79 and excavated from 1909 onwards (long after much of the main city).  It is now a popular part of tourist visits to Pompeii, and forms part of the UNESCO World Heritage Site at Pompeii.

House of Loreius Tiburtinus: The House of Loreius Tiburtinus (also called the House of Octavius Quartio) is renowned for its meticulous and well-preserved artwork as well as its large gardens.  It is located in the Roman city of Pompeii.  It, along with the rest of Pompeii was preserved by the volcanic eruption of Mount Vesuvius on August 24, 79 AD.

Cirta: Cirta (from Berber: KRTN or Kirthan, Phoenician: "Tzirta" ) was the capital city of the Berber Kingdom of Numidia in northern Africa (modern Algeria).  Its strategically important port city was Russicada.  Although Numidia was a key ally of the ancient Roman Republic during the Punic Wars (264–146 BC), Cirta was subject to Roman invasions during the 1st and 2nd centuries BC.  Eventually it went under Roman dominion during the rule of Julius Caesar.  Cirta was then repopulated by Roman colonists by Caesar and Augustus and was surrounded by a "Confederation of free Roman cities" (Tiddis, Cuicul, Milevum, etc.) The city was destroyed in the beginning of the 4th century and was rebuilt by the Roman emperor Constantine the Great, who gave his name to the newly constructed city, Constantine.  Vandals damaged Cirta, but emperor Justinianus I reconquered and improved the Roman city.  Arabs finally captured it in 698 AD.

Supporting paragraphs: Vesuvius (disambiguation) Mount Vesuvius
Answer: Gulf of Naples