colosseum outside in details, rome, italy, the largest standing ancient amphitheatre in the world

landmark arch architecture palace column quail ruins monument building history tourism temple facade amphitheatre colosseum inside details rome italy largest standing ancient world built travertine limestone volcanic rock brick-faced concrete used gladiatorial contests animal hunts executions re-enactments famous battles dramas based roman mythology sea eliptical ruined sunny day shadows outside attraction monument history historic vacation summer tourist tourism decorative backround