Reminder: pain in French means terrific bread; it is not painful to eat!
By the time this was built, estimated to be between AD 10 and 25, the Romans aimed to construct a complete architectural façade against which to stage their theatrical performances. As I understand it, the thrust of this was not only to be massive (see the tiny people to the far right of the frame) but to promote their vanquishing of this region. The formal name these days of this wonder is Théâtre antique d’Orange, and it is one of two that survive in this detail. Back in Roman days entrance was free; today you pay (that’s okay, your funds support maintenance), plus have to exit a winding trail through their junk shoppe.