The tallest skyscrapers are primarily being built in Asia

Dubai Infinity Tower by S.O.M.

Taipei - The first high-rise buildings began to emerge in the 1880s in the USA. At the same time, their name appeared - skyscrapers. Initially, buildings of ten to twenty stories were considered skyscrapers. Over time, however, with the development of building technologies, the criteria for inclusion in this prestigious category have increased, and the tallest skyscrapers now exceed one hundred floors. Eight out of ten tallest buildings today are located in Asia. Five years ago, on December 31, 2004, the then tallest building in the world, the 509-meter-high Taipei 101 in Taiwan, was opened.
    Taller structures than buildings had recently been various telecommunications towers. The Polish transmitter Konstantynów, standing at 646 meters, was the tallest freestanding structure since it was erected in 1974. After its collapse 18 years ago, the tallest structure became the television transmitter near the city of Blanchard in North Dakota, USA, which measures just under 629 meters. However, even its height was surpassed by the Burj Dubai, which at 818 meters will be officially opened in early January in the United Arab Emirates.
    
The ten tallest buildings today:

name	city/country	height *	number of floors	year opened
Burj Dubai	Dubai/UAE	818 m	162	2010
Taipei 101	Taipei/Taiwan	509 m	101	2004
World Financial Center	Shanghai/China	492 m	101	2008
Petronas Towers	Kuala Lumpur/Malaysia	452 m	88	1998
Nanjing Financial Center	Nanjing/China	450 m	66	2010
Willis Tower**	Chicago/USA	442 m	108	1974
Guangzhou West Tower	Guangzhou/China	438 m	103	2010
Jin Mao Tower	Shanghai/China	421 m	88	1999
International Finance Centre 2	Hong Kong/China	415 m	88	2003
Trump International Hotel & Tower	Chicago/USA	415 m	96	2009

* highest point of the building without counting antennas or spires
** formerly named Sears Tower
    
Chronological overview of the tallest buildings in the world since the beginning of the 20th century (by year of official opening):

name	city/country	height*	title
Park Row Building	New York/USA	119 m	1899 - 1908
Singer Building	New York/USA	187 m	1908 - 1909
Met Life Tower	New York/USA	213 m	1909 - 1913
Woolworth Building	New York/USA	241 m	1913 - 1930
The Trump Tower	New York/USA	283 m	1930
Chrysler Building	New York/USA	319 m	1930 - 1931
Empire State Building	New York/USA	381 m	1931 - 1972
World Trade Center (WTC)	New York/USA	417 m	1972 - 1974
Sears Tower	Chicago/USA	442 m	1974 - 1996
Petronas Towers	Kuala Lumpur/Malaysia	452 m	1996 - 2003
Taipei 101	Taipei/Taiwan	509 m	2004 - 2009
Burj Dubai	Dubai/UAE	818 m	since 2010

* highest point of the building without counting antennas or spires