Porte Noire
Besançon, France · built 176
The Porte Noire (literally, "Black Gate") is a Roman triumphal arch in Besançon, France. The limestone arch was located at the southern end of the cardo, the main north-to-south route of a Roman city. It measured 5.6 metres in width and 11.2 metres in height, and its two facades were identical, of which the northern one is the better preserved.
Monument data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).