On the May 1, 2015 edition of 99% Invisible:
When it was built in 1977, Citicorp Center (later renamed Citigroup Center, now called 601 Lexington) was, at 59 stories, the seventh-tallest building in the world. You can pick it out of the New York City skyline by its 45-degree angled top. But it’s the base of the building that really makes the tower so unique. The bottom nine of its 59 stories are stilts.
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