Pompeii was a city in Italy remembered for its destruction by the volcano Vesuvius in the 1st century. (TV: The Fires of Pompeii; AUDIO: The Fires of Vulcan)
History
A group of Pyrovile landed in the region and slept for thousands of years until awakened by an earthquake in 62 AD. They set in motion a plan to xenoform the Earth into a planet of fire, to become their new home. In 79 AD, shortly before the volcanic eruption that was destined to destroy the city, the Tenth Doctor and Donna Noble arrived and foiled the Pyroviles' plan.
Unfortunately, to save the Earth, the Doctor and Donna were forced to trigger the eruption of the volcano, Vesuvius. The eruption completely destroyed the city and killed most of its population of twenty thousand people. Although Donna pleaded with the Doctor to rescue the population, he stated that the event was a crucial and unchangeable event in history, a fixed point in time. However, he agreed to save the Caecilius family from the destruction.
The eruption was so powerful that it briefly created a time rift, which by echoing back in time granted a number of Pompeii's citizens precognitive powers. (TV: The Fires of Pompeii)
The Seventh Doctor and Melanie Bush arrived in Pompeii on the day before the eruption and tried to escape from the coming eruption. The Doctor's TARDIS was buried in the city. (AUDIO: The Fires of Vulcan)
The Daleks once stole the Mark One model of a time machine called the Time-Conveyor, which was built by Peter and David's uncle. They hoped to reverse-engineer their own time machine from it. Peter and David pursued them through time in the Mark Two. They finally recovered it in Pompeii during the eruption of Vesuvius, having defeated the Daleks one-by-one along the way. (PROSE: Timechase)
After millennia of legend, archaeologists eventually rediscovered the lost city, and humanity remembered its fate. (TV: The Fires of Pompeii)
In 1980, an earthquake damaged Pompeii and uncovered the buried TARDIS. (AUDIO: The Fires of Vulcan)
Alternative Timelines
A time disruption briefly changed history so that Vesuvius took longer to erupt, allowing the city's populace to evacuate in their boats. (PROSE: The Algebra of Ice)
References
On the planet Torcaldi, Barbara Wright was reminded of Pompeii when she found the inhabitants of Cantosi frozen in time. (PROSE: The Ruins of Time)
The Eleventh Doctor once commented that the victims of the Shroud, which lined the walls of its wormhole, looked a lot like the victims of Pompeii. (PROSE: Shroud of Sorrow)
Jack Harkness in his rogue days claimed that Pompeii was an excellent setting for a time agent con job, as long as you got out before "Volcano Day". (TV: The Doctor Dances)
From the graffiti in Pompeii, historians were able to learn a great deal about Roman life. (AUDIO: The Unwinding World)