Castel Gandolfo: Vatican Observatory Experience

Observe stars through a telescope and see lake views from a terrace

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Castel Gandolfo

Large telescope mounted in a domed wooden observatory, with light streaming in from a small window.

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About This Experience

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.

Building with a large, dome-shaped roof, two shuttered windows, an open door with a metal staircase, and a plaque on the wall.

What’s Included

* Access to the astronomical domes in the Palace * Access to the Papal Palace third floor

What's Not Included

* Transport * Guided tour * Audio guide

Visit information

Large telescope inside a wooden-domed observatory ceiling with visible mechanical components and cables.

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From

€15.00

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Updated 29 Oct 2026 UTC

Location

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Castel GandolfoPiazza della Libertà

Practical information

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