[helloworld11]

Unlike many ancient structures, the Pantheon has mostly been left intact across the millennia. The Dome is entirely original and so is most of the remaining structure. From what I know, the majority of the restoration and renovation work has been to the interior ground-level walls and some of the exterior along the ground level, but even these are mostly minor renovations. In this case, what you see truly is for the most part what always was, and especially for the main awe-inspiring part, the great dome.