A 1,900-year-old building that would have served as an apartment within the estate of Roman Emperor Hadrian has been discovered in Tivoli, Italy. The building is full of lavish artwork, archaeologists said. "The exceptionally well-preserved decoration of the rooms includes mosaic floors with both vegetal and abstract patterns, marble revetments [panels], wall paintings, and an almost entire ceiling fresco," the archaeologists wrote in the summary of a paper recently presented at the Archaeological Institute of America's annual meeting in San Francisco. Much of the art is now in pieces, and the process of excavating and conserving it is a difficult...