Valcamonica Rock Art is Italy's oldest treasure. Michael S. Cole's thoughtful virtual tour of Pompeii has lots of information and pictures. Fictional Rome offers a vast database of great reading. Forum Romanum offers an amazing compendium of information about ancient Rome. The Christian Catacombs of Rome. Wikipedia has a list of all the triumphal arches built by the Romans still standing in what was once the Empire.
Wikipedia has a list of all the triumphal arches built by the Romans still standing in what was once the Empire.