Holy See
Although the Holy See is sometimes metonymically referred to as the "Vatican", the Vatican City State was distinctively established with the Lateran Treaty (1929) between the Holy See and Italy to ensure the temporal, diplomatic, and spiritual independence of the Papacy. As such, ambassadors are officially accredited to the Holy See and not the Vatican City State. Conversely, Papal nuncios to states and international organisations are recognised as representing the Holy See and the integrity of the Catholic Church along with its 1.3 billion members, not the Vatican City State, as prescribed also in the Canon law of the Catholic Church (1983). The "Holy See" thus refers to the See of Rome viewed as the central government of the Catholic Church. The Catholic Church, in turn, is the largest non-government provider of education and health care in the world, while the diplomatic status of the Holy See facilitates the access of its vast international network of charities.
Prisoner in the Vatican
The stand-off was ended on 11 February 1929, when the Lateran Pacts created a new microstate, that of Vatican City, and opened the way for diplomatic relations between Italy and the Holy See. The Holy See in turn recognized the Kingdom of Italy, with Rome as its capital, thus ending the situation whereby the popes had felt constrained to remain within the Vatican. Subsequently, the popes resumed visiting their cathedral, the Basilica of St. John Lateran, situated on the opposite side of the city of Rome, and to travel regularly to their summer residence at Castel Gandolfo, from Rome.