The roman walls of Senlis date back from the 3rd century AD. A dozen towers and walls are still to be seen. The walls were rather high, towering at 7 meters (21 feet).
Roman walls by is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
It can be used for non-commercial purposes with the following text and link:
Photo from: <a href="http://www.france-in-photos.com/">France in Photos</a>