Vatican City is the smallest state in the world, occupying 108.7 acres, of which about one third is covered with buildings and is situated on the right side of the Tiber river. Vatican City has territory, population, and sovereignty. This territory, limited as it is, suffices to guarantee the spiritual and temporal independence needed for the exercise of the Holy See’s spiritual mission. In 1870 the Kingdom of Italy seized all Vatican possessions which for several centuries had constituted the papal temporal domain. But even after 1870 the Holy See continued to regard itself as a separate entity in international law and was recognized as such by numerous states with which it retained normal diplomatic relations. After long discussions the Holy See and the then Kingdom of Italy signed the Lateran Pacts on February 11, 1929, so that the complete and independent authority of the Vatican State was and is recognized by the Italian state. The Sovereign of this small state is His Holiness, the Pope. The government presently is administered by a Pontifical Commission of which Raffaella Petrini is the first religious sister to hold the position. is President.