The Pantheon is one of the most preserved and influential building in ancient Rome. This temple is dedicated to the Gods of pagan Rome. It was built and dedeicated between A.D. 119 and 125.
The Roman Colosseum originally know as Flavian Amphitheater. 80 arched entrances allowing easy access to 55,000 spectators. Just right outside of the Colosseum is the Arch of Constantine. This is a 25m high monument built in AD315.
The Trevi Fountain the largess and most famous Barque fountain in Rome (standing 25.9 meters high and 19.8 meters wide).