Why go
Read this before walking from St. Peter’s Square into the Basilica or the Museums. The grand public spaces express the papacy’s religious role, while the state around them reflects a much later settlement with Italy. The contrast makes Vatican City’s unusually small footprint and its much wider influence easier to understand.
The full story
The popes once ruled lands far beyond the present Vatican. Donations and political alliances helped form the Papal States, which stretched across parts of central Italy. Their territory changed over the centuries, but Rome remained central to papal authority. In 1870, the Kingdom of Italy took Rome, ending the popes’ territorial rule there and leaving a dispute over their political status. The Lateran Treaty of 1929 settled that dispute by recognizing Vatican City as a sovereign state. That history explains a striking contrast on the ground. St. Peter’s Square opens toward Rome and receives large public gatherings, while the state behind the basilica includes gardens, institutions and working spaces with different access. The Vatican Museums preserve collections assembled under successive popes; their galleries are part of this longer history of patronage, not simply an extension of the basilica. The pope leads the Catholic Church, whose community extends far beyond these walls. Vatican City gives that office an independent territorial home. Seeing the square, basilica and museums as parts of both a religious center and a state makes their different purposes clearer.