Models show how it evolved during
the years of 150-50 BC.
Extensive excavation has revealed buildings from different periods, some of them overlapping—
from the Gallo-Greek period a council house, treasury, fountain, wells, and a house with alcoves and a painted bedroom.
Remains from the Gallo-Roman period include a large basilica, forum, Gemini temples, theater complex, monumental platform and a fountain.