After the discovery of the building that perhaps supported Nero's rotating dining room on the Palatine, excavations for Line C of Rome's subway brought to light a building that, according to the first hypotheses made by archaeologists, is thought to be Hadrian's Academy, built in 133 A.D. to host poets, rectors, philosophers, men of letters, scientists and magistrates. Hadrian, or Publius Aelius Hadrianus, ruled from 117-138 AD. He was an avid philosopher who was commonly referred to as one of the "five good emperors." Hadrian's Wall, in Northern England was built after a great war in what was then called...