古罗马斗兽场：罗马皇冠上的宝石

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 bu...