Spent a whole day here and could have spent many more. It's not cheap and there's a lot to see so I would start early in the day. The crown jewels are just incredible and everything is displayed so well.
Paris is my favourite city in the world. In fact, it's kind of ridiculous just how obsessed with it I am. Obsessed enough to turn my room into a shrine. Obsessed enough to spend the last two years learning the French language. One day I'll move there. If only they could balance their budgets.
Consider walking around the south side of the walls around the Vatican, seeing the relationship of the piazza to that area... There's not much north of the Vatican except a touristy shopping district...
Takes at least half a day if not longer. But ABSOLUTELY worth it. Make sure you do a guided tour. Well worth the price. We did Maximus Tours (good price, great guide): Takes at least half a day if not longer. But ABSOLUTELY worth it. Make sure you do a guided tour. Well worth the price. We did Maximus Tours (good price, great guide): http://www.vaticantou...miprivate/7…see moresee less