Why did Roman cities in Gaul have forums, baths, and amphitheatres?

In the history of France, the presence of forums, baths, and amphitheatres in Roman cities in Gaul was a direct result of the rapid Romanization of the region following the Roman conquest.12

As Gaul was assimilated into the Greco-Roman world, local administrative centers—known as civitas-capitals—were developed to align with Classical criteria. These urban centers were designed by local magnates at their own expense to reflect Roman status and culture. The inclusion of these specific structures served several purposes:12

• Forums: These served as the central, multipurpose public gathering places for administrative, judicial, and commercial activities.3
• Baths: These were essential features of Roman life, providing facilities for hygiene, exercise, and social interaction.4
• Amphitheatres: These arenas were constructed to host the public spectacles and ceremonies that were central to Roman social and political life.4

Ultimately, the construction of these buildings was a way for Gallic leaders to demonstrate their level of Romanization, as status was increasingly measured by how closely a community’s way of life mirrored that of the Mediterranean Classical city-states.12