Five Decades of Innovation

When it opened in 1969, 875 North Michigan Avenue (then the John Hancock Center) in Chicago represented cutting-edge construction technology, becoming the first high-rise building to employ a braced-tube structural system; photo courtesy of CTBUH.

In recognition of its founding in 1969, the Council on Tall Buildings and Urban Habitat (CTBUH) has spent 2019 looking at the past five decades of skyscraper construction and development, as well as imagining what the next five decades might bring — hence, its 50th anniversary theme, “50 Forward | 50 Back.” The celebration will come to a head at the end of this month with the CTBUH 10th World Congress in Chicago. As in previous events, the congress will feature workshops, presentations, panel discussions and a symposium. The special focus, however, will be “The 50 Most Influential Tall Buildings of the Last 50 Years,” a global roster of landmark structures that, each in its own way, “represented a significant change in thinking or technique” from what came before. The list includes 1969’s 875 North Michigan Avenue (the former John Hancock Center) in Chicago; the Lotte World Tower in Seoul (2017) and the Burj Khalifa (2010), Dubai’s awe-inspiring megatall. Whether it was construction technique, environmental friendliness or outside-the-box architectural design, each building on the list had a notable role in advancing the art and science of the skyscraper, one of humankind’s most iconic creations.

CTBUH is expecting more than 1,500 delegates from at least 45 countries to attend the congress, which opens on October 28. An online registration portal will be open until October 18, so there’s still time to sign up. For more information or to register, visit the CTBUH website’s 2019 program page.

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