The Roman Journal
This is, if memory doesn’t fail me, the only building from Antiquity in modern Rome which didn’t suffer structural alterations since it was concluded, in the time of emperor Hadrian. you can enter the Pantheon (the Greek word means ‘all gods’) knowing this is what it really looked like to a Roman of the 2nd century CE. The gray corinthian columns may raise some suspitions, for at a distance they look like if made of base concrete. Quite the opposite happens—these are extremely rare monoblocs of gray granite extracted from a very specific place in Egypt and brought to Rome at great cost. They arrived with some centimeters lacking, forcing the architects to a creative solution, and two of the monoblocs never arrived at all, forcing them to an even more creative adaptation of the original plan. Respect.