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Chicago Architecture: one story at a time

Chicago has long been a laboratory for architectural innovation and experimentation. Discover the stories behind some of the city’s most significant skyscrapers, museums, theaters, bridges, homes, schools, houses of worship and parks.

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Featured Building of Chicago

A Modernist Masterpiece

Built for the Standard Oil Company of Indiana, the Aon Center is a classic piece of Modernist architecture that stands out from its steel-and-glass peers in Chicago’s skyline. Upon opening in 1973, it was the world’s second-tallest building.

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