The Roman theater had Greek ancestors and Roman ambitions, which meant it was grander, more permanent, and more politically charged than the tradition it inherited. Greek theaters were cut into hillsides; Roman theaters were freestanding structures built anywhere the politics and patronage required, carrying their own support in the massive substructures that allowed them to be erected on flat ground without natural topography to exploit. The technical capacity to build a freestanding theater — requiring vaulted concrete substructure at a scale that Hellenistic builders had not attempted — was itself a statement about Roman engineering ambition, and the theaters that survive from across the empire, from Orange in France to Aspendos in Turkey, demonstrate that the ambition was fulfilled consistently.