History : Jan-Feb 2018
the interior of the Pantheon’s drumlike rotunda is remarkable because its height is exactly the same as its diameter—142 feet. If the outline of the interior of the dome was continued so it became a regular sphere, its bottom half would perfectly fill the space available (see the area marked in light blue in the image). Although there is no proof that Hadrian and his architects were consciously following a philosophical model, the monument’s proportions have been interpreted to reflect the idea of a cosmos formed of celestial spheres, as perceived by Aristotle in the fourth century b.c. HEAVENLY SPHERES 3.