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 ...

The Pantheon features a stunning concrete dome that is still the largest unreinforced concrete dome in the world. Here are ...

Located opposite the Pantheon, in a beautiful 18 th-century building, this boutique hotel is full of character. Les Dames du ...