![Fine Marbles in 14 Different Colors from Constantine the Great’s Danube Bridge Opening in 328 AD Found in Roman City Ulpia Oescus in North Bulgaria](https://i0.wp.com/archaeologyinbulgaria.com/wp-content/uploads/2021/03/ulpia-oescus-roman-city-constantine-the-great-marbles-danube-bridge-4.jpg?resize=150%2C150)
Fine Marbles in 14 Different Colors from Constantine the Great’s Danube Bridge Opening in 328 AD Found in Roman City Ulpia Oescus in North Bulgaria
Archaeologists have discovered a total of 14 different kinds of highly sophisticated colorful marbles used in lavish wall decorations of a grand hall in the huge Roman city of Ulpia Oescus in North Bulgaria, and believe they most likely had…