One of the largest domes in the world, the Pantheon, is made of concrete. You saved a lot of money building this dome with concrete. But remember: concrete is very heavy. About halfway down the ...

Watch: At the center of the Roman Pantheon, this visitor is delighted by a surprise rainstorm cascading from an oculus.

Exterior – The building ... an awe-inspiring atmosphere. The dome, when viewed from inside and bathed in sunlight, is particularly impressive. The Pantheon houses an impressive collection ...