From the "Leonardo Da Vinci" airport in Fiumicino (Rome) by car or bus, take the autostrada following the indications to "Centro" watching for indications to Stazione Termini or Colosseum.
By airport train: arriving at "Fiumicino" Airport, take the Air Terminal train to Rome. Once there, you can either walk for ten minutes or hop onto Metro (subway) Line B to metro station "Cavour".