Richmond Hill David Dunlap Observatoryin-person Doors Open Richmond Hill

  • In-person
  • 2024 theme: Adaptive reuse
  • Guided tours available
  • Kid-friendly
  • National Historic Site (Canada)
  • Parking
  • Site is protected by the Ontario Heritage Trust
  • Washrooms
  • Photography allowed
Richmond Hill David Dunlap Observatory

The Richmond Hill David Dunlap Observatory is a national historic site, designated under the Ontario Heritage Act. Opened in 1935, it was at the forefront of Canadian astronomical research, housing the then-largest telescope in Canada. Today, it is a facility for public education and outreach through city-run programs and partnerships. Please register to tour the Observatory and Administration buildings.

Since 1935, this observatory has been a research centre for the University of Toronto's Department of Astronomy and Astrophysics and a facility for public education and outreach. A popular site for Doors Open Richmond Hill, the David Dunlap Observatory gives us a glimpse into the skies above us from a spectacular facility. During Digital Doors Open, take a virtual tour of the site through the video below. Also, enjoy a short history of the site from the Royal Astronomical Society of Canada. Or learn how to use a star finder to find your way around the night skies.

Contact info

123 Hillsview Drive
Richmond Hill, Ontario


Year built: 1935
Building type:AttractionEducational facilityHistorical landmark
Architect: Mathers and Haldenby
Architectural style:Beaux arts

Dates/hours open

May 11, 10:00am - May 11, 04:00pm

Saturday: 10 a.m. to 4 p.m.