Building 20

Building 20 is a historic observatory structure within the Quebec Citadel National Historic Site in Quebec City, Canada.

About Building 20

Originally built as the Quebec Observatory between 1850 and 1883, the stone, gabled-roof structure served a dual purpose: it housed astronomical instruments and a time ball mechanism used to signal accurate time to mariners in the harbour below. Its director was Edward David Ashe, considered Canada's first astrophysicist, known for his work in solar research.

History

The building has been classified a Federal Heritage Building in recognition of its historical, architectural and environmental value. It currently stands vacant, preserved as part of the Citadel's heritage landscape.

Location & getting there

Building 20 sits within the Quebec Citadel, a fortified site overlooking Quebec City, Canada, making it easy to combine a visit with the Citadel's other historic attractions.

Visiting Building 20

As the building is currently vacant, it is best viewed as part of a wider visit to the Quebec Citadel; check the Citadel's own visitor information for current access to the grounds.

See your named star from here

Building 20's original role — tracking precise positions in the sky and marking exact time — echoes what a Star Register certificate gives you today: a real star with fixed, verifiable coordinates. Name a star or browse the catalogue.