Castel Gandolfo & the Vatican Observatory

41°44′N, 12°39′E — Alban Hills, Lazio, Italy — papal summer residence; Specola Vaticana headquarters

What's documented

Castel Gandolfo is a small town in the Alban Hills southeast of Rome, the historical summer residence of the Pope. The Specola Vaticana — the Vatican Observatory — has its headquarters here. Founded in its modern form by Leo XIII in 1891 (with roots going back to the Gregorian calendar reform of 1582), the institution is one of the oldest astronomical research institutes in the world. Its contemporary instrument is the Vatican Advanced Technology Telescope (VATT), operational on Mt. Graham, Arizona since 1993, jointly operated with the University of Arizona's Steward Observatory.

Public-record imagery

Apostolic Palace of Castel Gandolfo — the papal summer residence.Wikipedia Commons · CC BY-SA 4.0 · Livioandronico2013 · 2015

Dome of the parish church at Castel Gandolfo, Bernini.Wikipedia Commons · CC BY-SA 4.0 · Livioandronico2013 · 2015

The Specola Vaticana — Vatican Observatory dome at Castel Gandolfo.Wikipedia Commons · CC BY-SA 3.0 · Rb85 · 2008

A second view of the Specola Vaticana.Wikipedia Commons · Attribution · Stefano Bolognini · 2008

The Specola Vaticana in 1891 — the institution's modern refoundation under Leo XIII.Wikipedia Commons · CC BY-SA 4.0 · Rc 13 · 2019

The Vatican Advanced Technology Telescope (VATT) on Mt. Graham, Arizona — the Specola's contemporary instrument.Wikipedia Commons · CC BY-SA 3.0 · Jjstott · 2010

VATT at ground level, jointly operated with the University of Arizona Steward Observatory.Wikipedia Commons · CC BY-SA 3.0 · No machine-readable author provided. GreatInca assumed (based on copyright claims). · 11 N