The interior of the Pantheon, the oldest domed building. It was built by Hadrian from A.D Rome Italy (there are no chairs and tired tourists are not allowed to sit down to rest, if even only to stare up at that beautiful dome)
Michelangelo, Sistine Chapel, Vatican this shows both the ceiling and the last judgment. The ceiling is a beautiful work of art with great detail. The last judgement even has more detail and it was done 29 years after the ceiling.