Where: 100 Adelaide West
History: Tiles, painting and carved stonework by Group of Seven artist J.E.H. MacDonald and his son Thoreau.
Distinguishing features: Art deco styling, including ceiling frescos, mosaic panels and patterned terrazzo floors featuring distinctly Canadian themes.
Why it's important: It's one of the few buildings put up during the Depression to be designated by the city as historically significant (1975).
The threat: A plan to demolish all but the first three storeys of the 16-storey structure and replace it with a 41-storey tower.
Chances of saving it: A snowball's chance in you-know-where (unless the developer is suddenly hit by pangs of guilt). The city has already given overwhelming approval, despite pleas from the chairs of the Ontario Heritage Foundation, the Heritage Canada Foundation, the Art Gallery of Ontario and the National Gallery.
Herbert Elgie House
Where: 56 Blythwood
History: Built by Elgie, the contractor who built Casa Loma.
Distinguishing features: Two-and-a-half-storey L-shaped design; stone detailing, gable roof with extended eaves, single-storey open porch and carport.
Why it's important: It's an understated example of the Arts and Crafts movement in architecture and forms part of the Heritage Conservation District that includes nearby St. Hilda's Church.
The threat: A plan by the developer to demolish the house and replace it with three others.
Chances of saving it: Not totally out of the question. The city has agreed to put up legal costs to take on the developer, who's currently seeking a variance for the property at the Ontario Municipal Board.
Where: 65 Front West
History: It rose from the ashes of the great fire of 1914 that demolished 14 acres in Toronto's downtown manufacturing and warehouse district.
Distinguishing features: Zumbro stone interior walls, Tennessee marble floors, Bedford limestone columns.
Why it's important: Designed in the grand manner of the Paris Ecole de Beaux-Arts, it's one of the most significant hubs in Canada's railway system.
The threat: The Union Pearson Group was recently awarded a 100-year lease on the property, but no one knows what its "redevelopment" plans include.
Chances of saving it : Only time will tell.
The Cathedral Church of St. James
Where: 65 Church
Completed: Original building 1807, current building 1853.
History: The land was cleared for construction after the American Revolution; the church was levelled by fire in 1849 and rebuilt.
Distinguishing features: Clock tower, distinctive spire, 200-year-old burial ground on site.
Why it's important: One of the finest examples of early English Gothic architecture in North America.
The threat: Two condo towers are planned for the cathedral's north side. Similar plans are in the offing at other parishes where shrinking congregations have forced churches to sell off land to make up for revenue shortfalls.
Chances of saving it: Details are still sketchy on how the proposed development, which will require moving some of the bodies buried on site, will incorporate the pastor's residence. The latest news is that the church has sold air rights that could accommodate condo towers as high as 50 storeys that would dwarf the church spire.
The Engholm-Fry House
Where: 10 Riverlea Road, Etobicoke
History: Built for F.G. Engholm, engineer and president of Marcotta Company of Canada, and occupied for 40 years by the family of noted marine biologist Frederick Ernest Joseph Fry; featured in Canadian Homes and Gardens 1950 Book Of Homes.
Distinguishing features: Radiant heating, exterior panels of porcelain-enamelled steel, rubber floor tiles, central air conditioning (one of the first), pipe system recycles waste water for the garden.
Why it's important: Rare example of modern post-war architecture.
The threat: The owner is determined to sever the lot and rebuild despite widespread opposition from area residents and preservationists.
Chances of saving it: Pretty slim since it has already been trashed, or unless preservationists can come up with the $380,000 the owner is asking.
Toronto District School Board building
Where: 45 York Mills East, North York
History: Former Baron Renfrew School; built by residents with money raised by a special tax levy.
Distinguishing features: Its Palladian architectural design inspired by Etruscan temples also incorporates Georgian elements. The ravine in the rear has been identified as a natural heritage area, and the site is entirely within the area defined by the new Ravine Protection Bylaw.
Why it's important: First public institution built in the former village of York Mills, representing a pinnacle of the community's achievement.
The threat: Plan to build 83 condominium townhouses at $1.4 million a pop - and an emerging trend on the part of cash-strapped school boardss to sell off valuable property to make ends meet.
Chances of saving it: Currently before the Ontario Municipal Board, but it looks like a done deal; the city's not raising objections.
Where: 400 Eglinton West
History: Declared a national historic site in 1993; formerly owned by Famous Players.
Distinguishing features: Projecting canopy, sign tower with tiered pylon.
Why it's important: Blends features of the Art Deco and Art Moderne styles of the 1930s.
The threat: The current owners want to turn the theatre into an "entertainment venue" and have begun making alterations inside, including to the stage (which now includes a kitchen), the main auditorium and the foyer.
Chances of saving it: Only half bad - there are currently no proposals to change the exterior of the building.
Historic Fort York
Where: 100 Garrison Completed: 1793
History: Location of the Battle of York during the War of 1812.
Distinguishing features: Home to Canada's largest collection of 1812 buildings.
Why it's important: Birthplace of modern Toronto.
The threat: Encroaching development, including condo towers to the south, which will cast very long shadows on the fort, particularly in winter - not to mention blocking the view of the lake that gave the fort its raison d'être.
Chances of saving it: All but died when the city built Fort York Boulevard to feed local high-rise development. So much for the "parks and open space" plan talked about for the area.
The original Mount Sinai Hospital
Where: 100 Yorkville
History: Canada's first Jewish general hospital and the first in Toronto to have a radiology unit.
Distinguishing features: Elegant facade.
Why it's important: Last of three historic sites remaining in Yorkville.
The threat: Plans for two condo towers of eight and 18 storeys
Chances of saving it: Already approved by the Ontario Municipal Board. The Developers have agreed to incorporate the facade in their design, provided it doesn't delay construction and that relocating and storing the facade while the project is being built doesn't cost the city more than $600,000.
North Toronto Collegiate Institute
Where: 70 Roehampton
History: The school was completed the same year the town of North York became part of the city of Toronto.
Distinguishing features: High ceilings, wide corridors, large classrooms - apparently too large for a province that's now funding schools on a per-square-foot basis.
Why it's important: It's the first in a potentially long line of older secondary schools sitting on prime real estate to be put up for sale due to provincial funding cuts and out-of-sight repair and maintenance costs.
The threat: A proposal to replace it with a more modern structure and three 30-storey condominiums.
Chances of saving it: Not great; the local trustee seems to be pushing the proposal.
History of destruction
Number of historically significant properties in Toronto: 5,000
• Number formally recognized under the Ontario Heritage Act: 1,300
• Number demolished in recent years in the old cities of Toronto and Scarborough: 62*
• Number lost to development: 38
• Number lost because of neglect: 24
• Number of days demolition can be delayed under current legislation: a maximum of 180
• Percentage of all heritage buildings demolished in Ontario in recent years: 22 * Preservationists say the actual numbers are much higher, but that demolition is difficult to track because of the time it takes to compile archival data.