The Vatican, known as the headquarters of the Roman Catholic Church. Vatican City State as it can also be called is a sovereign city-state situated inside Rome and belongs to the Holy See. Vatican City is internationally recognised as an independent state and is the smallest in the world. It also has it owns national anthem, flag and issues its own special Vatican coins; however, you can also use Euro, even though it isn't a member of the European Union.
The entire Vatican State is acknowledged as a UNESCO world heritage site since 1984. St. Peter's Basilica, St. Peter's Square, the Vatican gardens and The Vatican Museums are the main tourist attractions in Vatican City.
We would suggest to dedicate a whole day...or two to Vatican City. I would probably avoid going to the Vatican first thing in the morning as you will be waiting a long time because of all of the tour buses. In saying that, there is no 'good' time to visit any historical attraction, whether that be in the Vatican, Rome or the world, as you will always be fighting against the tour groups.
Vatican State as a whole is absolutely breathtaking, we would highly recommend visiting if you are in Rome.
I remember six years ago when Dylan first went to Europe, he told me about an amazing gelateria in Rome. So, last year when we were on our travels, Rome was one of our destinations. I was extremely excited to try the gelato at Old Bridge as Dylan had hyped it up to be the best he has ever had. While in Rome, I'm pretty sure we went to Old Bridge nearly every day! I'd say this was definitely my fault as I even convinced Dylan to go at 9/10pm with some incredibly bad chafe. *There may have been some arguing...but the gelato fixed everything*
If you ever get the chance to go to the Vatican...or Rome for that matter, then we would strongly recommend going to Old Bridge Gelateria. Seriously, it is the best gelato I've ever had...and I've tasted my fair share.