This Gallo-Roman temple was transformed into a church at the end of Antiquity. It was restored between 1852 and 1880.
Despite its geographical location closer to Lyon and on the Rhône river, Vienne represents the historical heart of the region: it was once the capital of the Allobroges, an opulent Roman city, an important early bishopric in Christian Gaul, a centre of religious influence in the 12th century, etc.
It wasn't until the end of the Middle Ages that it went into decline against Grenoble, capital of the Dauphine, and Lyon, an economic centre of international importance. From this rich past it has retained a Roman theatre and temple, both well-preserved, a Romanesque cloister, and a superb Romanesque and Gothic cathedral.