About Pantheon
From outside, it looks like a Greek temple portico glued onto a cylinder. Inside, the scale changes: the dome is about 43 meters across, the same as the height from floor to top, so a perfect sphere would fit in the hall. The oculus, around 9 meters wide, is the only window, and through it come sunlight, late-afternoon glow and, now and then, rain.
For that reason the floor slopes slightly and has discreet drains. The building became a church in 609, and continuous use helped keep it standing. Raphael is buried here, as are the kings Victor Emmanuel II and Umberto I.
