Ponza is the largest of the Pontine archipelago south of Cape Circeo on the Italian mainland. It takes its current name from Pontius Pilate of New Testament fame who had earlier been governor there. Some writers have attempted to link Ponza with Atlantis. In antiquity it was called Tyrrhenia and what we see today is just a remnant of a much larger landmass that legends claim to have been connected to the mainland with a large coastal city. The area is active both volcanically and seismically unstable. The harbour floor of nearby Pozzuoli on the mainland has sunk and risen several times over the past 3,000 years. Any connection between Ponza and Atlantis is purely speculative but in some ways it has a greater claim to consideration than Santorini.