Visiting the Vatican is a highlight of any trip to Rome – even more so because this tiny city-state is easy to see in a half-day or so. That is, as long as you don’t plan to see the entirety of the Vatican Museums. The Vatican collections are so vast you’d need weeks inside the museums to see everything. That’s not the only admonishment to keep in mind when visiting the Vatican, however. Here is a list of some other important DON’Ts in Vatican City.