John Hancock Tower, Boston

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Description

The John Hancock Center in Chicago is one of the most influential skyscrapers of the twentieth century. When completed in 1969 this was the tallest tower in the world outside New York City and is still the most famous structural expressionist style building in high rise architecture. By using new technologies like the computer and developments in steel, the tower's designers revolutionised the way skyscrapers were built and created a true masterpiece of engineering. But cutting edge construction always courts controversy - and despite being the birthplace of skyscrapers, Chicago wasn't convinced it wanted this enormous dark hulk on its skyline.