Vestiges of the Gallo-Roman wall, Grenoble

The Vestiges (traces) of the Gallo-Roman wall are the remains of a fortification, constructed in Grenoble, France (formerly called Cularo) at the end of the 3rd century, under the reign of the Emperors Diocletian and Maximian. The status of Civitas marked the city of Cularo as an administrative capital of the Roman Empire.

Source: Wikipedia — Vestiges of the Gallo-Roman wall, Grenoble (CC BY-SA 4.0)