Castel Gandolfo: Astronomical Observatory experience

Explore the Astronomical Observatory of the Apostolic Palace of Castel Gandolfo, now open to the public after nearly ninety years. You can visit two functioning Vatican domes: the main dome, equipped with an optical telescope for observing stars and planets, and the smaller dome, which houses a double astrograph used for mapping the sky.

Access to the observatories is via a spiral staircase leading to the third-floor terrace, where you can enjoy a view of Lake Albano. The admission ticket allows access to the domes and the third floor of the Apostolic Palace.