National Historic Site of Canada

William Brydone Jack Observatory National Historic Site of Canada

Fredericton, New Brunswick

Also known as William Brydone Jack Observatory, Observatoire William Brydone Jack

General view of the William Brydone Jack Observatory, showing its simple functional design consisting of a short octagonal tower topped with a conical roof, 1992.

General view of the William Brydone Jack Observatory, showing its simple functional design consisting of a short octagonal tower topped with a conical roof, 1992.

Photo: Agence Parcs Canada / Parks Canada Agency, 1992.

Built
1851
Recognized
1954
By
Government of Canada

The register’s text, word for word

Description

The William Brydone Jack Observatory National Historic Site of Canada is a small structure, consisting of an octagonal tower topped with an octagonal conical roof, with a one-storey, gable roofed portion to one side. The building is covered with wooden clapboarding, and simple wooden mouldings and brackets under the roof finish the exterior surfaces. The interior volumes are also plain and serviceable. Designation refers to the building on its footprint.

Heritage value

William Brydone Jack Observatory was designated a national historic site of Canada in 1954 because:

-it was the first astronomical observatory in Canada.

The William Brydon Jack Observatory was built in 1851 at the instigation of William Brydone Jack, professor of mathematics, natural philosophy and astronomy; and president of the University of New Brunswick, 1861-65. Schooled in the traditions of Scottish universities, he equipped the observatory with the best instruments of the day. In collaboration with Harvard observatory he determined the longitude of Fredericton and other places in New Brunswick, and corrected errors in international boundaries.

SourceHistoric Sites and Monuments Board of Canada, Minutes, 1954.

Character‑defining elements

Key elements contributing to the heritage value of this site include:

  • its simple, functional design, consisting of a short octagonal tower topped with a conical roof, with a one-storey rectangular wing attached;
  • the construction materials, simple finishes and volumes;
  • the internal disposition of spaces;
  • the surviving equipment;
  • the building’s site and setting in relation to the University of New Brunswick campus.

End of the register’s text

Location

3 Bailey Drive, Fredericton, New Brunswick, E5M, Canada

45.56500° N, 66.38300° W

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Nearby

All 104 places in Fredericton

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From the Canadian Register of Historic Places, as last updated on December 12, 2025. The register’s text is shown word for word.