Some of Ottawa’s most intriguing spaces will open their doors to the public this weekend as Doors Open Ottawa returns on June 6 and 7, 2026. The popular annual event gives residents and visitors free access to more than 100 buildings across the city, many of which are rarely open for public tours.
Celebrating Ottawa’s bicentennial this year, the event’s theme, Doors to the Past – Bytown’s Bicentennial Journey, shines a spotlight on the people, places, and stories that helped transform Bytown into Canada’s capital,” said Mayor Mark Sutcliffe.
Among the featured sites are Rideau Hall, the official residence of the Governor General, the Royal Canadian Mint, and Library and Archives Canada, where visitors can get a glimpse into areas typically off-limits to the public. The Ingenium Centre, home to Canada’s vast collection of science and technology artifacts, is also welcoming guests for special behind-the-scenes tours.
Other notable stops include the Supreme Court of Canada, Ottawa City Hall, historic churches, museums, and diplomatic buildings representing countries from around the world. Together, they showcase the remarkable range of architecture, history, innovation, and culture found throughout the capital.
Where to Start
Start with any of these Ottawa 200 historically significant stops, and plan your day or weekend adventure from there:
Laurier House National Historic Site
Walk through the home of Prime Ministers Sir Wilfrid Laurier and William Lyon Mackenzie King. For over 50 years, from 1897 to 1948, the house occupied a central position in the political life of Canada, as the place of residence of Laurier and, after his death, of Mackenzie King.
Rideau Hall
Rideau Hall has been the official residence of every governor general of Canada since 1867 and their workplace since 1940. It is a National Historic Site with nearly two centuries of history and has become an important gathering place and site of official activities. Visitors can explore historic rooms and learn how Rideau Hall welcomes dignitaries from around the world. Please note that the private gardens and Palm House will be open to visitors on Sunday only.
Cumberland Heritage Village Museum
The Cumberland Heritage Village Museum offers you the chance to step back into rural life from the 1920s and ‘30s. With heritage buildings, costumed interpreters and hands-on demonstrations, this museum brings Ottawa’s agricultural roots to life in a way that’s engaging for the whole family.
Billings Estate National Historic Site
One of Ottawa’s oldest homes, the Billings Estate tells the story of early settlement along the Rideau River. Explore the grounds and discover how this family helped shape the community we know today.
Watson’s Mill and Dickinson House
In the village of Manotick, this working 19th century gristmill still turns grain into flour. Nearby Dickinson House completes the glimpse into village life and entrepreneurship in early Ottawa.
Heritage Building and Ottawa City Hall
Past meets present at this central landmark. The Heritage Building, originally built in 1875 as the Ottawa Normal School, became part of Ottawa City Hall after the 2001 amalgamation. It now serves as the executive wing, housing offices for key city officials such as the Mayor, City Manager, and City Clerk.
Bytown Museum (The Commissariat Building)
Located in the heart of downtown Ottawa, the Bytown Museum explores the stories of a thriving city and its people, from the early days of Bytown to the Ottawa of today.
Diefenbunker: Canada’s Cold War Museum
Descend into this once secret underground bunker built to protect Canada’s government during the Cold War. The Diefenbunker is Canada’s most significant surviving Cold War artifact.
Supreme Court of Canada
Step inside one of the country’s most important institutions. Visitors can take a guided tour to learn more about the architecture of the building, the Canadian judicial system and how the Supreme Court of Canada deals with important legal issues.
ByWard Market Building
At the heart of one of Ottawa’s oldest neighbourhoods, this historic market continues to be a vibrant gathering place. Discover its origins, architecture and how it has evolved and adapted to keep up with the community for nearly two centuries.
With so many places to discover, it’s easy to create your perfect Doors Open Ottawa adventure. Visit ottawa.ca/doorsopen to see the full list of participating buildings, schedule of activities, free shuttle information, and download the printable guide.
Now in its 24th year, Doors Open Ottawa has become one of the city’s most anticipated annual events, drawing thousands of visitors eager to discover the stories hidden behind some of the region’s most recognizable facades. Admission is free, and a complete list of participating buildings and visiting hours is available online.
notes and images from City of Ottawa, Doors Open
