Park Tower

Chicago, United States

Exterior only

Visible from the street; the inside is private.

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Park Tower, completed in 2000 at 800 North Michigan Avenue in Chicago, is a 257-meter (844-foot) postmodern mixed-use skyscraper designed by Lucien Lagrange Architects. Its 70 floors—67 in practical use—make it Chicago's twelfth-tallest building. The tower is one of the world's tallest structures clad entirely in architectural precast concrete and among the tallest non-steel-framed buildings globally, employing a cast-in-place concrete frame. Originally planned at 200 meters, the design was extended through increased ceiling heights. Notable for its compact 28,000-square-foot footprint, Park Tower was the first building in the United States designed with a tuned mass damper from inception—a 300-ton steel pendulum suspended from four cables that counteracts wind sway on the slender structure. The building combines a Park Hyatt Hotel (floors 2–18) with luxury residential condominiums (floors 20–70), along with retail and parking spaces, anchoring the northern edge of the Magnificent Mile.