Archaeologists are piecing together vivid 1,800-year-old frescoes from “thousands upon thousands upon thousands” of plaster fragments, with no picture on the box to guide them.

At some point before the year 200 A.D., workers demolished a building in the ancient Roman city of Londinium, and much like ...

London researchers recently reconstructed large Roman plaster collection, revealing vibrant frescoes hidden for 1,800 years ...