Part of the Great Building Feats series, which shows how and why the world's greatest structures were created, and how engineering, geographical and technical challenges were overcome during construction. Rising over 140 feet into the air, the majestic dome of the Roman Pantheon has astounded its viewers for more than two thousand yers. The first domed building of its size, and the first building to focus exclusively on its interior's visual impact, the Pantheon has inspired much of modern architecture. Built during the height of the Roman Empire, its ability to remain standing has remained a mystery that has intrigued people throughout history.