There are two airports in Rome: Fiumicino and Ciampino.
If you arrive at Fiumicino Airport (FCO), you can take the Leonardo Express train at the train station of the airport. It is a non-stop service between FCO and Rome Termini. Trains depart every half an hour from 6:23 am to 11:23 pm, and the trip takes about 30 minutes. The cost is 14 euros one way. If you prefer the bus (T.A.M. or Terravision), the bus station is on the right side of the exit of Terminal 3. The cost varies from 5 to 8 euros one way.
If you arrive at Ciampino Airport, you can take the ATAC bus number 520 (that leads you to Cinecittà, from where you can catch the metro line A to Termini -direction Battistini- whose cost is of 1,50 euros one way (includes one metro trip as well) or the bus T.A.M. or Terravision whose costs vary from 5 to 8 euros one way.
Most of the meetings will take place at Sapienza University of Rome.
Address: Piazzale Aldo Moro, 5
The public transport system in Rome is wide-ranging.
Rome has three metro lines (A to C). During your city break, you will probably only use subway line A and B (Line C is still largely under construction) only switching between trains and metros at the Termini stop. You have several options for buying tickets at the ticket machines. It is important to know that the same ticket is valid for all public transport (ATAC) including metro, trams, buses (with the exception of the tourist buses) and even a number of regional trains (Trenitalia 2nd class, Roma-Lido, Rome-Viterbo and Rome-Giardinetti). These tickets are not valid all the way to the airport; please read this airport transfer article for more information. You can choose from a number of different tickets:
BIT Metro Ticket: This ticket costs 1.50 € and allows you to use public transport for 100 minutes after you stamp it. You are only allowed to make one trip by metro or train.
Rome Metro Card: This popular combination ticket gives you unlimited access to public transport (incl. metro) and access to the Hop on Hop off bus for 1 day (27.00 €) or 3 days (39.00 €). You can easily reserve the Rome Metro Card online.
Roma 24H Ticket: This 7 € ticket allows you to travel for 24 hours after activation.
Roma 48H / 72H Ticket: With this ticket you can travel 2 days for 12.50 € or 3 days for 18.00 €. Tip: You can now also purchase your public transport card (72 hours) incl. Airport transfer from Ciampino online. Buy this public transport card here.
CIS Metro Ticket: With this ticket of 24 € you can travel 7 days.
The metro runs every day from 5:30 am to 11:30 pm, 01:30 am on Saturdays
Children up to 10 years old travel for free when accompanied by a paying adult
Do remember to stamp your ticket (you do this yourself in the buses and trams), or you will risk a fine
A map of the center of Rome with the metro stops is available here
The temperatures during your stay are expected to be between 12° and 22° (or more), with few chances of getting rain.