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The Abraj Al-Bait Is Very Religious

As you’d expect from a giant building in Mecca, the Abraj Al-Bait Towers make religion central to much of its purpose. The clock is ale to broadcast prayers from loudspeakers that can be heard miles away, it houses a museum of Islamic art, and dedicates a significant amount of space to prayer rooms and other religious areas—40,000 square feet.

One World Trade Center Had a Name Change

New York Governor George Pataki announced in 2005 that, once completed, the tallest building in the Western Hemisphere would be known as the Freedom Tower. But after considering that it might be more practical to market the building using a more familiar name, the Port Authority of New York and New Jersey announced in 2009 that it had been renamed One World Trade Center.

Willis Tower Is Actually Nine Separate Towers

The (at that time) Sears Tower was constructed as a group of nine individual buildings that all have the same width of 75 square feet, but range in height from 50 stories to 108 stories. According to the building’s architect, this “tube system” was inspired by a pack of cigarettes.

The Burj Khalifa’s Windows Are Cleaned the Old Fashioned Way

The 24,000 windows of the world’s tallest building are cleaned just like any other building—with soap and water and a team of washers who are clearly not afraid of heights. A team of 36 cleaners wash the windows year-round. They only work on surfaces when they are in the shade, to avoid the sun, and are strapped into state-of-the-art cages. Plus, they wear special protective clothing that looks a lot like a moon suit. And for more architectural astonishment, check out the 17 Floating Hotels That Are Simply Magical.

New York Is Still Home to One Type of Tallest Building

Though its days as the home of the tallest buildings in the world are behind it, New York City does still have a claim as the place where the tallest residential building in the world stands. That would be the 1,396-foot-tall 432 Park Avenue building, completed in December 2015 and overlooking Central Park. And if you live in the Empire State, you’ll appreciate these 30 Things That Always Annoy People in Cities.

The Port Authority Owns One World Trade Center’s Land

This 16-acre site on which the landmark stands is owned by a government agency controlled by New York and New Jersey’s governors, though über-developer Larry Silverstein currently holds the lease for the retail and office space.

Of all the mega-tall skyscrapers, the Abraj Al-Bait Towers in Saudi Arabia are the world’s bulkiest, with seven individual towers of varying heights in addition to the central clock tower, giving it the biggest floor area in the world. The development as a whole boasts nearly 17 million square feet.

The tower which carries the name of its developers has 108 floors and is expected to be completed in 2021.

Another Chinese tower ties in height with the last one, but we have more information to give here. The building towers above the new extension of Beijing’s central business districts.

The 97-story-high tower is designed by the Chicago-based American practice Skidmore, Owings & Merrill (SOM), with the aim of achieving a Gold LEED.

The 97-story-high tower is designed by the Chicago-based American practice Skidmore, Owings & Merrill (SOM), with the aim of achieving a Gold LEED.

South Korea’s only tower on the list has already topped out. Its external construction works have been finished as well, and it is expected to open in the fall, later this year.

Also known as Baoneng Shenyang Global Financial Center, the Chinese 114-storey-skyscraper is designed by British Multination Firm Atkins.

Yes, this is Tianjin’s second skyscraper on the list and China’s fifth, and this is not the last of it.

The 115-floor tower, again by Kohn Pedersen Fox, was scheduled to open in 2016, but the opening was delayed to this year.

We are nearing the top of the list with our third tallest under-construction skyscraper, in another far-east Asian country. The 118-floor tower is designed by Australian practice Fender Katsalidis Architects.

Here’s another tower expected to be finished in 2018. It seems that 2018 is the year to expect miracles. The mixed-use tower, by the American Adrian Smith + Gordon Gill Architecture,

Yes, you have seen it right. The Gulf strikes again. The world’s ‘new’ highest building, it seems, will become a reality in 2020, finally surpassing Dubai’s 828-meter skyscraper