Located on the west side of the River Tiber is the Vatican City, a completely independent sovereign state. This walled state has its own pharmacy, telephone system, post office and more. When visiting St Peter’s Basilica and the Vatican Museum, the two main sites, you must have your shoulders and knees covered. If not you will be refused entry. Also, the Vatican Museum is closed every Sunday apart from the last Sunday of the month. On this day entry is free.