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.
Catholic Church and science
Scientific support continues through the present day. The Pontifical Academy of Sciences was founded in 1936 by Pope Pius XI, with the aim of promoting the progress of the mathematical, physical, and natural sciences and the study of related epistemological problems. The academy holds a membership roster of the most respected names in 20th century science, many of them Nobel laureates. Also worth noting is the Vatican Observatory, which is an astronomical research and educational institution supported by the Holy See.