Ars Technica: Archaeologists map centuries of history beneath world’s oldest cathedral

Ars Technica: Archaeologists map centuries of history beneath world’s oldest cathedral. “The Archbasilica of St. John Lateran doesn’t quite look its age. The basilica, where the Pope presides in his role as Archbishop of Rome, was already ancient when it was rebuilt in the 1650s…. Centuries of Roman history lie buried in the darkness in layers stretching down to 8.5 meters (27.89 feet) below the modern floor of the cathedral, and the subterranean archaeological sites are like a honeycomb through the city’s Caelian Hill. Now, using a combination of laser scanning and ground-penetrating radar, archeologists have made a complete map of the site.”