Visit the chicago museum, step out onto the ledge, and take in breathtaking views from americaβs highest observation deck. Completed in 1974 by skidmore, owings & merrill (som), the willis tower, formerly the sears tower, is a spectacular achievement in modern engineering and design. Willis tower, skyscraper in chicago, located at 233 south wacker drive, that was the worldβs tallest building until 1996
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That year it was surpassed by the petronas twin towers (1,483 feet [452 meters] tall), in kuala lumpur, malaysia.
The willis tower is an international style skyscraper designed by skidmore, owings & merrill, with bruce graham as lead architect, and built between 1970 and 1974, for a reported $175 million dollars, in chicago, il.
With a total of 110 floors and an overall height of 527 meters, including its antenna, it was the tallest skyscraper in the world at the time of its completion The tower was designed as a solution to consolidate numerous offices scattered across chicago into a single building. The willis tower, formerly the sears tower, is an interesting amalgamation of architecture and urban progress It reigned as the tallest building in the world for more than two decades, from 1973 to 1998.
