"Roman Architecture:The Romans ruled the largest empire of ancient times. At its peak, the Roman Empire included all the lands bordering the Mediterranean Sea. It also extended as far north as Scotland and as far east as the Persian Gulf."...(Read More from this article and search for specific Roman buildings.)

Source Citation: Hersey, G. L., and Marvin Trachtenberg. "Architecture." World Book Advanced. World Book, 2011. Web.  21 Feb. 2011.