Quarries of the Tenth Doctor Era
TENTH DOCTOR: Ancient Rome, anything goes. It’s like Soho…but bigger.
DONNA: You’ve been here before, then?
TENTH DOCTOR: Hm, ages ago. Before you ask, that fire had nothing to do with me…well, a little bit.
— The Fires of Pompeii
Doctor Who on Location: Rome (Cinecitta Film Studios), Italy (The Fires of Pompeii)
History According to Doctor Who: The eruption of Mount Vesuvius (and as a result, the destruction of Pompeii) was intentionally triggered in order to prevent the Pyroviles from converting Earth into a new Pyrovillia. (The Fires of Pompeii)