The Colosseum:
No visit to Rome is complete without having seen its magnificent Colosseum, a vast amphitheatre with seating for 55,000 that was designed as a horse racing circuit and arena for animal fighting and gladiatorial battles. Upon its completion, spectacular 100-day celebrations were organized as part of the opening ceremony in 72 AD. Its name is believed to come from Nero's enormous statue of Colossus that stood close by.