List of tallest buildings
The international non-profit organization Council on Tall Buildings and Urban Habitat (CTBUH) was formed in 1969 and announces the title of "The World's Tallest Building" and sets the standards by which buildings are measured. It maintains a list of the 100 tallest completed buildings in the world. The organization currently ranks Burj Khalifa in Dubai as the tallest at . The CTBUH only recognizes buildings that are complete however, and some buildings included within the lists in this article are not considered finished by the CTBUH.
First Canadian Place
First Canadian Place was the 6th tallest building in the world to structural top (currently 103rd) and the tallest building overall outside of Chicago and New York when built in 1975. It was also the tallest building in the Commonwealth of Nations until the completion of the Petronas Towers in Kuala Lumpur, Malaysia, in 1998. The Bank of Montreal "M-bar" logo at the top of the building was the highest sign in the world from 1975 until overtaken by the sign atop CITIC Plaza in 1997. The roof is still the location of a number of antennas used for radio and television broadcasting. The structure contains 29 elevators, and is one of only a few buildings in the world that uses the double-decked variety, and is connected to the underground PATH system.