A stratovolcano on the Gulf of Naples in Campania in south-central Italy. Mount Vesuvius, which last erupted in 1944, is the only active volcano on mainland Europe. The most notable eruption of Mount Vesuvius was in AD 79 when it buried the Roman cities of Pompeii, Herculaneum, and Stabiae. The only surviving eyewitness accounts of that eruption are a pair of letters written by Pliny the Younger to Tacitus. The 1908 Summer Olympics were relocated from Rome to London after a surprise eruption of Mount Vesuvius.