You lucky thing. Sorry no advice on places to go, I usually look up a few things on the net before I go anywhere, but have a great time anyway, enjoy yourself, is it a belated birthday trip for last week?
Its my birthday today ha ha.... can't believe my hubby actually has booked this trip as a surprise pressie!!! he is not usually that thoughtful ha ha....my daughter studies History of Art at Queens University so she has given me HER itinerary!!! of all the things to see ie Pantheon Theatre, Trevi fountain, etc etc.......ha ha but I will look up the net thanks.
I've been to Rome - it's a magical city, and people really do fall in love with it. It sounds a little twee, but don't miss the good old Colisseum (spelling?) and especially the whole Roman Forum (which is right next to the colisseum). It's a place to lose your heart in. Give it a good long afternoon's visit. Enjoy, what a fab birthday pressie.