If the building is measured to the architectural top-the most commonly used ranking-it does not include antennae, signage, flagpoles or other functional-technical equipment.ĭespite the fact Chicago buildings no longer stack up to the magnitude of buildings being constructed now, the city still has its impact.

Building rankings vary depending on the way their height is determined. “Supertalls” are buildings more than 300 meters (or about 984 feet) high and “megatalls” are buildings more than 600 meters (or about 1,968 feet) high. The Council on Tall Buildings and Urban Habitat has created internationally recognized height criteria to measure and define tall buildings. That doesn’t mean, however, that Chicago has stopped leaving its mark in the world of tall buildings. But the quickly changing tall building environment and an ongoing race to build taller has knocked the former Sears Tower out of the top 10 tallest. For nearly 25 years after its completion in 1974, the 110-story building held the title of tallest building in the world. When Chicagoans think about tall buildings, they immediately think of Willis Tower. That’s because skyscrapers around the world can trace their roots-or rather their grillage-to Chicago. Some of Chicago’s tallest buildings aren’t located in Illinois, or even the United States.

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