10 Worst Roman Emperors Welcome to WatchMojo, and today we’re looking at the ten most widely reviled and criticized Roman Emperors. Serving between 253 and 260, Valerian reigned during the ...

Here’s how it works. Archaeologists found two Roman coins by a Roman-era building. On the right is a silver coin, known as an antoninianus, of Roman emperor Valerian II dated to A.D. 255.