Ancient Witnesses of Medieval Earthquakes

Even those who have not seen the Colosseum in Rome with their own eyes know from photos and media that about 50% of the outer wall on the south side is missing, while the northern wall is practically intact. The state of the Colosseum has been a mystery for a long time until surprising geological finding and seismological research provided a very likely explanation. The Rome is also famous for two monumental columns. They were built in the same way and while one is practically intact, the other is partially twisted and damaged. This chapter explains the powerful magic of site effects of earthquakes with epicentres more than 100 km from Rome.