Question: What do the first two letters in the name of the tallest Canadian structure stand for ?

text: List of tallest structures in Canada
Timeline of the tallest structures in Canada
Timeline of the tallest freestanding structures in Canada : Years Name Location Pinnacle height Floor count ( if applicable ) Structure type Image 1841–1874 Notre-Dame Basilica Montreal , Quebec 200 ft ( 61 m ) n/a Church bell tower 1874–1899 St. James Cathedral Toronto , Ontario 305 ft ( 93 m ) n/a Church bell tower 1899–1917 Old City Hall Toronto , Ontario 340 ft ( 100 m ) n/a City Hall clock tower 1917–1928 INCO Port Colborne Nickel Smelter Chimney # 1 Port Colborne , Ontario 350 ft ( 110 m ) n/a Smokestack 1928–1929 Tour de la Banque Royale Montreal , Quebec 397 ft ( 121 m ) 22 Building 1929 Fairmont Royal York Hotel Toronto , Ontario 407 ft ( 124 m ) 28 Building 1929–1952 INCO Nickel Smelter , Brick Chimney Sudbury , Ontario 500 ft ( 152 m ) n/a Smokestack 1936–1952 INCO Copper Smelter , Stack Sudbury , Ontario 500 ft ( 152 m ) n/a Smokestack 1937–1952 INCO Port Colborne Nickel Smelter Chimney # 2 Port Colborne , Ontario 500 ft ( 152 m ) n/a Smokestack 1952–1954 CBC Jarvis St. Tower Toronto , Ontario 540 ft ( 160 m ) n/a Lattice tower 1954–1967 INCO Copper Cliff Nickel Refinery ( formerly Copper Cliff Iron Ore Recovery Plant ) , Stack Sudbury , Ontario 637 ft ( 194 m ) n/a Smokestack 1967–1972 Toronto-Dominion Centre Toronto , Ontario 731 ft ( 223 m ) 56 Skyscraper 1972–1976 Inco Superstack Sudbury , Ontario 1,247 ft ( 380 m ) n/a Smokestack 1976–present CN Tower Toronto , Ontario 1,815 ft ( 553 m ) n/a Tower Timeline of the tallest structures overall in Canada :
This is a list of the tallest one hundred structures in Canada, measured from the base to the tallest point. Which may be the roof top, antenna, spire, mast or as in the case with smokestacks and bridges, the highest structural point. This list includes buildings, towers, transmission towers, chimneys, bridges and oil platforms. There is a separate list for guyed masts since their heights are not fully verifiable and may be inaccurate by several metres; i.e. - several are measured to the height of the tallest transmitter on the mast, but this is not necessarily the tallest point of the tower.
Years Name Location Pinnacle height Floor count ( if applicable ) Structure type
1841-1874 Notre-Dame Basilica Montreal , Quebec 200 ft ( 61 m ) n/a Church bell tower
1874-1899 St. James Cathedral Toronto , Ontario 305 ft ( 93 m ) n/a Church bell tower
1899-1917 Old City Hall Toronto , Ontario 340 ft ( 100 m ) n/a City Hall clock tower
1917-1928 INCO Port Colborne Nickel Smelter Chimney # 1 Port Colborne , Ontario 350 ft ( 110 m ) n/a Smokestack
1928-1929 Tour de la Banque Royale Montreal , Quebec 397 ft ( 121 m ) 22 Building
1929 Fairmont Royal York Hotel Toronto , Ontario 407 ft ( 124 m ) 28 Building
1929-1937 INCO Nickel Smelter , Brick Chimney Sudbury , Ontario 500 ft ( 152 m ) n/a Smokestack
1936-1937 INCO Copper Smelter , Stack Sudbury , Ontario 500 ft ( 152 m ) n/a Smokestack
1937-1954 CBL Hornby AM Transmitter Toronto , Ontario 640/650 ft 198 m n/a Guyed mast
1954-1955 CICT-DT TV Tower 1 Calgary , Alberta 670 ft 204 m n/a Guyed mast
1955-1960 CKNX Television Tower Wingham , Ontario 793 ft ( 242 m ) n/a Guyed mast
1960-1965 CHCH Television Tower Stoney Creek , Ontario 1,172 ft ( 357 m ) n/a Guyed mast
1965-1976 Cape Race LORAN-C transmitter Cape Race , Newfoundland 1,350 ft ( 410 m ) n/a Guyed mast
1973-1976 CKX-TV Craig Television Tower Hayfeild , Manitoba 1,350 ft ( 410 m ) n/a Guyed mast
1976-present CN Tower Toronto , Ontario 1,815 ft ( 553 m ) n/a Tower