Between flights, I will have a 9 hour lay-over in Rome this coming December (I should arrive at 6 am and leave just after 3 pm). This will be my first visit to Italy.
What can I plan to do considering it will be winter-time and I will only have about 3 to 4 hours in the city (after deducting the time it takes to get there & back and to go through customs and everything). Visiting the Vatican museum would be lovely, however, I'm not too sure if these few hours would be anywhere near enough time for that (?)
I enjoy sightseeing, history, city life, architecture, good food and would greatly appreciate your help on what some other options would be and how to get to them.