All roads lead to Rome - or more precisely to its most iconic landmark - the Colosseum. Built under Emperor Vespasian in the 1st century CE, this magnificent monument, spanning two thousand years of history, is an emblem of the power of a bygone empire. With over seven million visitors a year, its massive structure and awesome architecture testify to the genius of ancient Roman building techniques, earning it a place not only among UNESCO’s world heritage sites, but as one of the new seven wonders of the world.