Ontario Heritage Trust

History and mandate

The Ontario Heritage Trust traces its institutional origins to the Archaeological and Historic Sites Board active during the 1950s. It was formally incorporated by the Ontario legislature in 1967 under the name Ontario Heritage Foundation. The agency's mandate is the protection, preservation and promotion of Ontario's built, natural and cultural heritage. In 2005, an amendment to the Ontario Heritage Act changed its name to the Ontario Heritage Trust, reflecting its evolving role as a steward of the province's heritage assets. The Trust's headquarters are located in the Ontario Heritage Centre, also known as the Birkbeck Building, which is itself a designated heritage building and a National Historic Site of Canada. The Trust operates as an arm's-length crown agency, reporting through the Ministry of Tourism, Culture and Gaming, and its work encompasses tangible structures, natural landscapes and intangible cultural stories.

Provincial Plaque Program

One of the Trust's longest-running and most visible initiatives is the Provincial Plaque Program, which began in 1955. The program commemorates significant people, places and events in Ontario's history with distinctive blue and gold markers. Since the first plaque was installed at Port Carling, the Trust has erected a total of 1,287 plaques. While the vast majority are located across Ontario, some plaques can be found internationally in France, Germany, Ireland, the Netherlands, the United Kingdom and the United States, marking Ontario's historical connections abroad. In 2018, the Trust initiated a review of its existing plaques to address outdated interpretations and terminology, leading to updates such as the replacement of the Shingwauk Hall Residential Schools plaque in Sault Ste. Marie after it was vandalized in 2021. The program remains active, with new plaques being unveiled, such as one in 2026 commemorating the Farmerettes who worked on Ontario farms from 1941 to 1952 as part of the United Nations International Year of the Woman Farmer. The plaque program serves as a physical historical record accessible to the public in communities across the province and beyond.

Doors Open Ontario

Doors Open Ontario is a major provincewide heritage tourism program operated by the Ontario Heritage Trust. The program works with local communities to provide the public with free access to explore fascinating heritage properties, cultural landmarks and historic spaces that are often not regularly open to visitors. The 2026 season marks the program's 25th anniversary, demonstrating its enduring popularity and success. The season typically runs from spring through fall, with the 2026 schedule kicking off with Doors Open Stratford on April 18 and concluding with Doors Open Niagara Falls on October 18. Other participating communities in the 2026 season include Belleville, Peterborough, Woodstock and many others. The program encourages residents and tourists to discover the unique architectural and cultural stories within their own communities and across the province. Specific events often tie into local milestones, such as Doors Open Woodstock in 2026 which celebrated the city's 125th anniversary on October 17. The program features a diverse range of sites, from operational facilities like the Decew Falls Water Treatment Plant and the Whitby Fire Department headquarters to cultural institutions like the Woodstock Art Gallery and natural areas like Burlington's waterfront and the Brockville waterfront along the St. Lawrence River.

Managed properties and public programming

The Ontario Heritage Trust directly manages or is involved with the operation of several significant heritage properties, using them as venues for public engagement and education. A flagship property is the Elgin & Winter Garden Theatres in Toronto, a National Historic Site celebrated as the last operating stacked theatre complex in the world. The Trust offers regular 90-minute guided tours of the theatres, which recount their history, restoration and feature the world's largest collection of vaudeville scenery. These tours visit the original and new lobbies, the elegant Elgin Theatre and the unique Winter Garden Theatre. Another notable property is Fulford Place, a historic mansion in Brockville, which hosts seasonal events like themed ghost tours that explore stories of its past. The Trust also facilitates special public access to natural heritage sites, such as offering free admission to the Cheltenham Badlands in Caledon on Ontario Day, which is celebrated on June 1. These sites and programs transform historic assets into dynamic spaces for learning and experience.

The Trust's calendar includes a diverse array of public events at its venues, often in partnership with other organizations. These events range from heritage-focused activities to cultural performances that activate the historic spaces. The Elgin & Winter Garden Theatres host not only tours but also paranormal investigation events in partnership with Haunted Walks Toronto, where small groups explore the empty theatres after dark. The venues also serve as performance spaces for comedy shows, author talks and musical events presented by external promoters. This blend of heritage programming and contemporary cultural events ensures the properties remain vital community assets. The Trust's public offerings are designed to appeal to a wide audience, from history enthusiasts to those seeking unique entertainment experiences.

• Guided tours of the Elgin & Winter Garden Theatres, detailing the history and architecture of the stacked theatres.
• Fulford Place Ghost Tours, offering themed explorations of the historic mansion after dark.
• Paranormal investigation events at the Elgin & Winter Garden Theatres in partnership with Haunted Walks Toronto.
• Special Ontario Day promotions, including free access to sites like the Cheltenham Badlands.
• The unveiling of new provincial plaques, such as the 2026 plaque honouring the Farmerettes.
• Partnership events with cultural presenters for comedy shows, author talks and musical performances within Trust venues.
• Digital historical timelines and online resources released for occasions like Ontario Day 2026.
• Collaborative events with organizations like the Samara Centre for Democracy and the Toronto International Festival of Authors.

Ontario Sport Awards

In addition to its cultural and built heritage work, the Ontario Heritage Trust has a long-standing connection to commemorating athletic achievement. The organization began honouring sports achievements in 1965. The Ontario Sport Awards Program was formally established a decade later in 1975. This program recognizes outstanding accomplishments by Ontario athletes, coaches and volunteers, linking the province's sporting history to its broader cultural legacy. The awards celebrate excellence and contributions across a wide spectrum of sports, from amateur to professional levels. The program reflects the Trust's holistic view of heritage, which includes the stories of human endeavour and community spirit found in sports.

Community engagement and special initiatives

The Trust's work is deeply rooted in collaboration with municipalities, historical societies and community groups across Ontario. Programs like Doors Open Ontario are fundamentally partnership-driven, relying on local organizations to open their doors and share their stories. For the 2026 season, the Trust highlighted Doors Open Woodstock, which coincided with the city's 125th anniversary, as an example of this community-centred approach. The Trust also engages the public through digital means, such as inviting Ontarians to explore a new digital historical timeline created for Ontario Day 2026. These initiatives demonstrate a commitment to making heritage accessible through both physical visitation and online resources, ensuring that Ontario's past remains relevant and engaging for all residents. The Trust frequently uses its social media presence, such as its @onheritage account based in Toronto, to announce new plaques, event schedules and special opportunities like free admission days.

Special initiatives often align with broader thematic years, such as the 2026 United Nations International Year of the Woman Farmer, which prompted the Trust's plaque for the Farmerettes. The Trust also responds to contemporary conversations about history, as seen in its ongoing plaque review begun in 2018 to ensure historical markers use appropriate and accurate language. This responsive and adaptive approach allows the Trust to balance the preservation of history with the evolving standards of historical interpretation and public discourse. By working directly with communities, the Trust helps local heritage stories reach a provincial audience while ensuring global or national narratives are grounded in local contexts and experiences.

Heritage tourism and economic impact

The Ontario Heritage Trust plays a significant role in the province's heritage tourism sector. Programs like Doors Open Ontario attract visitors to communities across the province, often during shoulder seasons, providing an economic boost to local businesses. The 2026 season, spanning from April to October, is designed to draw people to regions like Stratford, Niagara Falls, Muskoka and the St. Lawrence River corridor. The Muskoka Discovery Centre in Gravenhurst and the Brockville waterfront are examples of sites featured in the program that attract tourists. The guided tours of major attractions like the Elgin & Winter Garden Theatres in downtown Toronto are themselves a tourist draw, contributing to the city's cultural offerings. By promoting and providing access to heritage assets, the Trust helps sustain the tourism economy while educating visitors about Ontario's history.

The Trust's work in preservation also has a direct economic dimension through the restoration and maintenance of historic properties. The careful restoration of the Elgin & Winter Garden Theatres preserved a unique architectural treasure and created a viable venue for performances and tours. This kind of investment in heritage infrastructure supports skilled trades, conservators and tourism workers. The Trust's plaque program and support for local heritage sites help communities market their unique histories, differentiating them in a competitive tourism marketplace. The economic value of heritage is realized through job creation, increased visitation and the enhanced cultural capital of Ontario's cities and towns.

Questions about Ontario Heritage Trust

What is the Ontario Heritage Trust?

The Ontario Heritage Trust is a crown agency of the Ontario government dedicated to protecting, preserving and promoting the province's built, natural and cultural heritage. It manages heritage properties, operates the Provincial Plaque Program, and runs the Doors Open Ontario event. The Trust's headquarters are in the Ontario Heritage Centre, a designated heritage building in Toronto. It was founded in 1967 as the Ontario Heritage Foundation and renamed in 2005.

What is Doors Open Ontario?

Doors Open Ontario is a provincewide heritage tourism program run by the Ontario Heritage Trust. It provides free public access to hundreds of heritage sites, cultural landmarks and historic buildings across Ontario each year. The 2026 season marks its 25th anniversary, running from April to October with events in communities like Stratford, Niagara Falls, Belleville and Woodstock. Sites range from water treatment plants and fire halls to art galleries and historic theatres.

Can I tour the Elgin & Winter Garden Theatres?

Yes, the Ontario Heritage Trust offers regular 90-minute guided tours of the Elgin & Winter Garden Theatres in Toronto. This National Historic Site is the last operating stacked theatre in the world. Tours explore both the elegant Elgin Theatre and the whimsical Winter Garden Theatre, and visitors can view samples from the world's largest collection of vaudeville scenery. The Trust also hosts special events like paranormal investigations at the theatres.

What are the blue and gold plaques seen around Ontario?

These are provincial plaques installed by the Ontario Heritage Trust's Provincial Plaque Program, which started in 1955. The plaques commemorate significant people, places and events in Ontario's history. The Trust has erected 1,287 plaques, most in Ontario but some internationally in countries like France and the UK. The program is periodically reviewed to update historical interpretations, as was done starting in 2018.

What did the Ontario Heritage Trust do for Ontario Day 2026?

For Ontario Day 2026, the Trust invited people to explore a new digital historical timeline and visit cultural and heritage sites. It also offered free admission to the Cheltenham Badlands natural heritage site in Caledon on June 1. These initiatives were part of celebrations marking Ontario Day across the province. The Trust uses Ontario Day to promote broader engagement with the province's history.

When was the Ontario Heritage Trust founded?

The Ontario Heritage Trust was originally incorporated as the Ontario Heritage Foundation by the Ontario legislature in 1967. Its origins trace back to the Archaeological and Historic Sites Board during the 1950s. The agency was renamed the Ontario Heritage Trust in 2005 through an amendment to the Ontario Heritage Act. This crown agency operates under the Ontario Ministry of Tourism, Culture and Gaming. Its mandate is to protect, preserve and promote Ontario's built, natural and cultural heritage. Its headquarters are located in the designated heritage Birkbeck Building, also known as the Ontario Heritage Centre.

Sources and further reading

• Ontario Heritage Trust (Wikipedia)
• Ontario Heritage Trust | Calendar (heritagetrust.on.ca)
• Doors Open Ontario, Home Page (doorsopenontario.on.ca)

Checked by the Novello Desserts desk. Last updated 2026-10-26.