Pantheon

Historic · Pigna (Piazza della Rotonda)Rome,Italy

A temple in Rome from AD 125 still standing whole, its unreinforced concrete dome as tall as it is wide and open to the sky.

The Pantheon is a domed Roman temple that has stood roofed and whole for nearly nineteen centuries. Step inside and the scale rearranges itself. The interior is a perfect sphere, exactly as tall as it is wide, and the whole room turns around a shaft of light falling from a single round opening at the crown. That beam slides across the coffered ceiling and marble walls through the day like a slow sundial. Rain falls straight in and drains through small holes worn into the original Roman floor. Hadrian raised it around AD 125 but kept the name of Agrippa, builder of the first Pantheon, carved across the portico. The builders made the concrete lighter as it climbs, heavy travertine at the base and porous pumice near the crown, so the shell seems to float. The dome is still the largest ever built in unreinforced concrete. The building survived because in the seventh century it became a church, sparing it the quarrying that reduced most of ancient Rome to rubble. It is both monument and working church, and Raphael lies buried against one wall, beside two kings of Italy.

Worth knowing

Good to know

Remember it is a working church — services still happen under the dome, so the space asks for quiet even when it fills with cameras.
Expose for the light, not the room — the interior is dim and the sunlit disc fierce, so meter for the bright spot and let the coffers sink into shadow, the way the eye truly reads the space.
Come in late spring for the rose petals — at Pentecost, firefighters climb to the roof and shower thousands of red petals down through the oculus onto the crowd below, a revived old rite.

Things to do

1
Take the centre of the sphere
Walk to the exact middle of the floor and look straight up. From here the five rings of coffers tighten into perfect circles with the open oculus at their heart, and turning slowly on the spot sets the whole rounded room rotating around you. Then find the pale oval of sunlight the oculus throws and trace where it points, before looking at your feet: the marble floor curves faintly outward, with small drainage holes near the centre. On a rainy day, step back and watch water fall clean through the roof.
2
Find Raphael's quiet tomb
Cross to the left side of the rotunda and find Raphael's tomb, set behind a statue of the Madonna above a plain stone slab. Read the single Latin line carved beneath it, then stand back and notice how modest the resting place of Rome's most celebrated painter really is.
3
Touch a column before you enter
Before going in, pause under the front porch and lay a hand on one of the grey-and-pink granite columns. Each is a single shaft, cut in the Egyptian desert and hauled across the sea to Rome. Then look up into the porch ceiling—once sheathed in bronze, now stripped bare.