I personally wouldn't fly in Rome...I had a drone with me pretty much everywhere in Italy and only got to fly it in Lake Como area, very early in the morning with almost no one around. And even then DJi Go app displayed a message asking if I knew what I was doing.
Rome is very busy at all times. If you get caught, expect a hefty fine at best and another nail in the coffin of drone regulations. There was a French tourist who got caught flying a drone over the Coliseum (!) that is now risking €100k fine (I read about it in the paper).
