The Commonwealth of Nations dates back to the first half of the 20th century with the decolonization of the British Empire through increased self-governance of its territories. It was originally created as the British Commonwealth of Nations through the Balfour Declaration at the 1926 Imperial Conference, and was formalized by the United Kingdom through the Statute of Westminster in 1931. Though the current Commonwealth of Nations was formally constituted by the London Declaration in 1949, the Statute of Westminster in 1931 is most often used as dividing point between the British Empire and The Commonwealth.

Tallest structures

This list ranks structures that stand at least 300 m (984 ft) tall, measured from the base to the tallest structural point. This includes antenna masts, spires, and architectural details.

Rank	Structure	Height	Location	Country	Completed	Notes
1	CN Tower	553.3 m (1,815 ft)	Toronto, Ontario	Canada	1976	Tallest freestanding structure in the world until 2007; tallest freestanding structure in the Western Hemisphere.
2	Twin umbrella antennas of INS Kattabomman	471 m (1,545 ft)	Vijayanarayanam, Tamil Nadu	India	2013	Tallest military structure in the world.
3	The Exchange 106	453.5 m (1,488 ft)	Kuala Lumpur	Malaysia	2019	Tallest building in the Commonwealth of Nations.
4	Petronas Towers	452 m (1,483 ft)	Kuala Lumpur	Malaysia	1996	Tallest twin buildings in the world.
5	Kuala Lumpur Tower	421 m (1,381 ft)	Kuala Lumpur	Malaysia	1994
6	CKX-TV Craig broadcasting tower	412 m (1,352 ft)	Hayfield, Manitoba	Canada	1973, 1985	Collapsed in 1983; replaced by tower of same height.
7	Naval Communication System, Tower Zero	389 m (1,276 ft)	Exmouth, Western Australia	Australia	1967	Tallest structure of any type in the Southern Hemisphere.
8	Inco Superstack	380 m (1,250 ft)	Sudbury, Ontario	Canada	1970	Demolition to commence in 2020.
9	VLF Transmitter Skelton	365 m (1,198 ft)	Skelton, Cumbria, England	United Kingdom	2001	Tallest structure in the United Kingdom since April 2010.
10	Naval Communication Station, Towers 7-12	364 m (1,194 ft)	Exmouth, Western Australia	Australia	1967	A ring of six identical transmitters surrounding an inner ring of six shorter transmitters and the much taller "Tower Zero" transmitter.
11	CHCH-DT-3 TV Tower	360 m (1,180 ft)	Midland, Ontario	Canada	?
12	CHCH TV Tower	357.5 m (1,173 ft)	Stoney Creek, Ontario	Canada	1960
13	First Canadian Place	355 m (1,165 ft)	Toronto, Ontario	Canada	1975
14	Belmont Transmitter	351.7 m (1,154 ft)	Donington on Bain, England	United Kingdom	1965	Between October 2009 and April 2010, the mast was shorted from its original height of 387.7 metres to 351.7 metres.
15	Caldbeck transmitting station	337.1 m (1,106 ft)	Caldbeck, Cumbria, England	United Kingdom	1961, 2008	Original transmitter demolished in 2008; replaced by an identical tower built close to the original.
16	Emley Moor transmitting station	331 m (1,086 ft)	Emley Moor, England	United Kingdom	1971	Original 1964 transmitter had a height of 385.5 metres before collapsing in 1969; replaced by a shorter 331 metre transmitter in 1971.
17	Sky Tower	328 m (1,076 ft)	Auckland	New Zealand	1997	Tallest freestanding structure in the Southern Hemisphere.
18	Starbuck CBC Tower	324 m (1,063 ft)	Winnipeg, Manitoba	Canada	?
19	Q1 Tower	323 m (1,060 ft)	Gold Coast, Queensland	Australia	2005
20	Abeokuta Radio Mast	321 m (1,053 ft)	Abeokuta, Ogun State	Nigeria	?	Fifth tallest structure in Africa.
21	CIII Television Tower	316 m (1,037 ft)	Paris, Ontario	Canada	1974
22=	CFPL Television Tower	315 m (1,033 ft)	London, Ontario	Canada	1961
22=	Waltham Mast	315 m (1,033 ft)	Melton Mowbray, England	United Kingdom	1966, 1968	Collapsed in 1966 shortly after completion; replaced by identical tower in 1968.
24	Arfon Mast	314 m (1,030 ft)	Gwynedd, Wales	United Kingdom	1962
25	Menara Telekom	312 m (1,024 ft)	Kuala Lumpur	Malaysia	2001
26=	Winter Hill Mast	309 m (1,014 ft)	Belmont, England	United Kingdom	1956
26=	Sydney Tower	309 m (1,014 ft)	Sydney, New South Wales	Australia	1981
26=	Bilsdale Mast	309 m (1,014 ft)	Helmsley, England	United Kingdom	1969
29=	Black Hill Mast	307 m (1,007 ft)	Airdrie, Scotland	United Kingdom	1961
29=	Durris Mast	307 m (1,007 ft)	Stonehaven, Scotland	United Kingdom	1961
31	Strabane Mast	306 m (1,004 ft)	Strabane, Northern Ireland	United Kingdom	1963
32=	Mendlesham Mast	305 m (1,001 ft)	Mendlesham, England	United Kingdom	1959
32=	Lichfield Mast	305 m (1,001 ft)	Tamworth, England	United Kingdom	1961
32=	Mendip Mast	305 m (1,001 ft)	Wells, England	United Kingdom	1967
32=	Fazilka TV Tower	305 m (1,001 ft)	Fazilka, Punjab	India	2007
36=	PRTVC Rayfield Tower	304.8 m (1,000 ft)	Rayfield	Nigeria	?
36=	New Netim TV Mast	304.8 m (1,000 ft)	New Netim, Cross River State	Nigeria	?
38=	CKVR Television Tower	304 m (997 ft)	Barrie, Ontario	Canada	1955
38=	Naval Communication Station, Towers 1-6	364 m (1,194 ft)	Exmouth, Western Australia	Australia	1967	A ring of six identical transmitters surrounding the much taller "Tower Zero" transmitter.
40=	Central mast of INS Kattabomman	301 m (988 ft)	Vijayanarayanam, Tamil Nadu	India	1990
40=	SASOL III Synthetic Fuel Production Plant Smokestack	301 m (988 ft)	Secunda, Mpumalanga	South Africa	1984	South Africa left the Commonwealth in 1961 but rejoined in 1994.[1]
42	AKBC Broadcasting Tower	300.5 m (986 ft)	Uyo, Akwa Ibom	Nigeria	?
43	Large Ikorodu TV Mast	300.2 m (985 ft)	Ikorodu, Lagos State	Nigeria	?
44=	Duvha Power Station Smokestacks	300 m (980 ft)	eMalahleni, Mpumalanga	South Africa	1984	South Africa left the Commonwealth in 1961 but rejoined in 1994.[1]
44=	Komati Power Station Smokestack	300 m (980 ft)	Mpumalanga	South Africa	1966	South Africa left the Commonwealth in 1961 but rejoined in 1994.[1]
44=	Mumbai TV Tower	300 m (980 ft)	Mumbai, Maharashtra	India	1972

Former tallest structures

This list ranks demolished or destroyed structures that stood at least 300 m (984 ft) tall, based on standard height measurement. This includes antenna masts, spires, and architectural details.

Rank	Structure	Height	Location	Country	Completed	Notes
1	VLF Transmitter Woodside	427.0 m (1,400.9 ft)	Woodside, Victoria	Australia	1982	Demolished in 2015; was the second tallest structure in the Commonwealth of Nations upon completion in 1982. Tallest structure in the Southern Hemisphere for its entire lifespan.
2	Cape Race LORAN-C transmitter	412.0 m (1,351.7 ft)	Cape Race, Newfoundland and Labrador	Canada	1965	Collapsed in 1993; replaced by a much shorter 260m tower shortly thereafter.
3	Central Plaza	373.9 m (1,227 ft)	Hong Kong	Hong Kong	1992	The transfer of sovereignty over Hong Kong in 1997 ended the colony's status as a part of the Commonwealth through the United Kingdom.
4	CBC Tower	371.0 m (1,217.2 ft)	Shawinigan, Quebec	Canada	1972	Demolished in 2001; replaced by a new tower of an unknown but similar height. If the new tower's height is the same as the original, it would be the eighth tallest structure in the Commonwealth.
5	Bank of China Tower	367.4 m (1,205 ft)	Hong Kong	Hong Kong	1990	The transfer of sovereignty over Hong Kong in 1997 ended the colony's status as a part of the Commonwealth through the United Kingdom.

Timeline of tallest structures

This list ranks structures that were the tallest in the Commonwealth of Nations, measured from the base to the tallest structural point. This includes antenna masts, spires, and architectural details. Since 1973, Canada has been home to the tallest structure in the Commonwealth.

History of the tallest structures in the Commonwealth of Nations

Period	Building	Image	Location	Country	Height
1931 – 1954	Canadian Bank of Commerce Tower		Toronto, Ontario	Canada	145 m (476 ft)
1954 – 1956	CICT-TV Towers 1 & 2		Calgary, Alberta	Canada	250 m (820 ft)
1956 – 1960	Winter Hill transmitting station		Belmont, England	United Kingdom	309 m (1,014 ft)
1960 – 1967	CHCH TV Tower		Stoney Creek, Ontario	Canada	357.5 m (1,173 ft)
1967 – 1973	Naval Communication Station, Tower Zero		Exmouth, Western Australia	Australia	389 m (1,276 ft)
1973 – 1976	CKX-TV Craig TV Tower		Hayfield, Manitoba	Canada	412 m (1,352 ft)
1976 – present	CN Tower		Toronto, Ontario	Canada	553.3 m (1,815 ft)