Quadrifrons triumphal arch of Janus, Belltower of San Giorgio in Velabro's church, Rome, UNESCO World Heritage Site, Lazio, Italy, Europe

photography colour colour image color color image horizontal horizontal image outdoors outside day nobody no one no one tourist destination travel travel destination travel destinations history historical historic heritage old ruin ruins ruined old ruins remains quadrifrons triumphal arch arch arches arched arch of janus bell tower san giorgio velabro's 4th century unesco unesco world heritage site world heritage site rome lazio italy italian europe european building exterior building buildings architecture architectural antiquity roman civilization ancient ancient rome stone landmark landmarks famous well known well known ancient monument ancient culture cloud