The city reached a peak of influence during the 4th and 5th centuries, when Roman Emperors frequently used it as their headquarters during military campaigns in Europe. In 395, it became the seat of the Praetorian Prefecture of the Gauls, governing the western part of the Western Empire: Gaul proper plus Hispania (Spain) and Armorica (Brittany). At that time, the city was home to an estimated 75,000–100,000 people.
The city reached a peak of influence during the 4th and 5th centuries when Roman Emperors frequently used it as their headquarters during military campaigns in Europe. In 395, it became the seat of the Praetorian Prefectu,re of the Gauls, governing the western part of the Western Empire: Gaul proper plus Hispania (Spain) and Armorica (Brittany). At that time, the city was home to an estimated 75,000–100,000 people.