<prompt> Translate the following text to EnglishMji mkuu wa Gaul, Arles, mji mkuu wa Roma, unajulikana kwa kuwa na uwanja wa michezo wa gladiatori, na ina nafasi ya watu zaidi ya 20,000 katika siku za gladiators.  <response>: An important town in Roman Gaul, replacing Lyon as capital toward the end of the Empire, Arles boasts a very well-preserved amphi?theater arynes, seating over 20,000 in the days of the gladiators. 