Most of the people think that de Roman buildings were beautiful with beautiful whit stones, with pillars and arras', unfortunately it wasn't everywhere like this. You will see this in the chapter of the Roman Empire. The best information about the Roman architecture will come from Vitruvius. Vitruvius was a Roman Architect, who wrote a handbook for architects. He describes in his book "Handbook architecture" what it takes to be an architect. He also describe in his book what kind of materials an architect must use and on which point a architect must know something about and lots more is explained in his book.