Augusta Treverorum: important Roman city, modern Trier.
Like so many ancient Roman cities, Trier had an amphitheater for gladiatorial contests. It was partly dug inside the slope of the hill of the east of the city during the reign of Antoninus Pius (138-161), was included in the city walls, and was renovated after 293, when Constantius Chlorus moved his residence to the city on the banks of the Moselle. The arena measured 71 x 47½ meter. Although it has been used as a stone quarry, the amphitheater is pretty well preserved.