From the airport "Leonardo da Vinci" (Fiumicino)
Taxi: the fare from the airport to Piazza dei Caprettari is of €48,00approximately. Don’t forget to check if the taxi is licenced.
Train:two trains leave from the airport to Roma:
1) Leonardo Express: it is a fast direct train that arrives at Roma Termini Station with no intermediate stops; the ticket costs €14,00. At Termini railway station you can catch bus n. 40 or bus n. 64 to get to Largo di Torre Argentina; the office is located at walking distance from there.
2) FR1 Line : it is a line of the Rome metro and the ticket costs €8,00. Get off at Roma Trastevere Station and take tram n. 8 till the stop "Largo di Torre Argentina". The office is located 200 metres walking distance from there.
More information on Trenitalia.
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From Roma Termini Train Station:
Taxi: the fare from the station to Piazza dei Caprettari is of €10,00, approximately.
Bus: You can catch line n. 40 and line n. 64 to get to Largo di Torre Argentina. Bus ticket costs €1,50 and should be purchased at tabacconists’ or newspaper kiosks before getting on.