Tour
© Viator
Castles & Palaces
Castel Gandolfo: Vatican Observatory Experience
Wednesday, September 2, 2026 · 10:30 AM (venue local time)
© Tiqets
About
For the first time in almost ninety years, the astronomical domes of Castel Gandolfo's Papal Palace are open to visitors.
These include two functional observatories of the Vatican: the **major dome** with an 8.5-meter diameter, equipped with a Visual Telescope for observing stars and planets; and the **minor dome**, with an 8-meter diameter, featuring the Double Astrograph used for photographic surveys of the sky and the position of stars.
Access the observatories via a spiral staircase to the third-floor terrace, which provides views of Lake Albano.
These include two functional observatories of the Vatican: the **major dome** with an 8.5-meter diameter, equipped with a Visual Telescope for observing stars and planets; and the **minor dome**, with an 8-meter diameter, featuring the Double Astrograph used for photographic surveys of the sky and the position of stars.
Access the observatories via a spiral staircase to the third-floor terrace, which provides views of Lake Albano.
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From $17
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Frequently asked questions
When is Castel Gandolfo: Vatican Observatory Experience?
Castel Gandolfo: Vatican Observatory Experience takes place on Wednesday, September 2, 2026 at 10:30 AM (venue local time) at Papal Palace & Gardens of Castel Gandolfo, Rome.
Where is Castel Gandolfo: Vatican Observatory Experience taking place?
Castel Gandolfo: Vatican Observatory Experience is held at Papal Palace & Gardens of Castel Gandolfo, Piazza della Libertà, Rome, Italy.
How much are tickets for Castel Gandolfo: Vatican Observatory Experience?
Tickets for Castel Gandolfo: Vatican Observatory Experience start from From $17. Use the ticket link on this page for current pricing and live availability.
How do I buy tickets for Castel Gandolfo: Vatican Observatory Experience?
Buy tickets for Castel Gandolfo: Vatican Observatory Experience via the official ticket link on this page — it takes you straight to the seller's checkout. StayNxplore doesn't add its own fee on top; the price and any checkout fees are set by the ticketing partner.