Vatican City, officially the Vatican City State (Italian: Stato della Città del Vaticano; Latin: Status Civitatis Vaticanae), often shortened as the Vatican, is a landlocked sovereign city-state. Ruled by the pope, it is an enclave within Rome and serves as the administrative centre of the Catholic Church. Vatican City is governed by the See of Rome, commonly known as the Holy See, itself a sovereign entity under international law, which maintains its temporal power, governance, diplomacy, and spiritual independence. Vatican is also used as a metonym for the Holy See, which is the central governing body of the Catholic Church and Vatican City, comprising the pope and the Roman Curia. The independent state of Vatican City came into existence in 1929 via the Lateran Treaty between the Holy See and the Kingdom of Italy, which spoke of it as a new creation, not as a vestige of the much larger Papal States (756–1870), which had previously encompassed much of Central Italy.
The heart of the telescope is an f/1.0 honeycombed construction, borosilicate primary mirror. The mirror was manufactured at The University of Arizona's Steward Observatory Mirror Laboratory[1], which pioneered both the spin-casting and the stressed-lap polishing techniques which are being used for telescope mirrors that include the 6.5 meter aperture MMT and Magellan telescopes and the two 8.4 meter mirrors of the Large Binocular Telescope. The VATT's mirror is unusually 'fast', f/1, which means that its focal distance is equal to its diameter. Because it has such a short focal length, a Gregorian design could be employed which uses a concave secondary mirror at a point beyond the primary focus; this allows unusually sharp focusing across the field of view.
The unusual optical design and novel mirror fabrication techniques mean that both the primary and secondary mirrors are among the most exact surfaces ever made for a ground-based telescope. In addition, the skies above Mount Graham are among the most clear, steady, and dark in the continental North America. Seeing of better than one arc-second even without adaptive optics can be achieved on a regular basis.
Image 3A map of Vatican City, highlighting notable buildings and the Vatican gardens (from Vatican City)
Image 4The Apostolic Palace (Palazzo Apostolico), the official residence of the pope. Here, Benedict XVI is at the window marked by a maroon banner hanging from the windowsill at centre. (from Vatican City)
Image 5The Seal of Vatican City. Note the use of the Italian language (from Vatican City)
Image 16A guard of the Vatican at his sentry box (from Vatican City)
Image 17Pope Pius XI decree and conferment of Saint Therese of France to be Patroness of the gardens, flanked by Cardinal Louis Billot. The Leonine walls, 17 May 1927. (from Gardens of Vatican City)
Image 18Map of the Italian peninsula in 1796, showing the Papal States in central Italy coloured purple (from Vatican City)
Image 19One possible modern interpretation (from Vatican City)
Image 22A monument to Fr. Maximilian Kolbe, among the estimated 3,000 members (18%) of the Polish clergy who were killed by the Nazis; of these, 1,992 died in concentration camps. (from Vatican City during World War II)
... that the Vatican selected Mary Milligan in 1987 to be one of only three U.S. experts to assist the International Synod of Bishops on the Laity in Rome?