Porte de Mars is an ancient Roman triumphal arch in Reims, France. It dates from the third century AD, and was the widest arch in the Roman world.
Wikipedia https://en.wikipedia.org/wiki/Porte_de_Mars
Official Website https://www.reims-tourisme.com/porte-mars/reims/pcucha051v503i80
Address 5 Boulevard Désaubeau, La Neuvillette 51100, France
Coordinates 49°15'38.186" N 4°1'47.835" E