One May weekend each year, Doors Open Toronto invites the public to explore the city’s most-loved buildings and sites, free of charge. The event, which is recognized as one of Toronto’s most culturally significant events, provides rare access to buildings that are not usually open to the public and free access to sites that would usually charge an admission fee. Since its inception in 2000, it has attracted more than two million visits to nearly 700 unique locations and remains the largest event of its kind in Canada.