15 skyscrapers in a circle of one square kilometre
6576th tallest in the world (shared with 136 other buildings) 6259th tallest on the Northern Hemisphere (shared with 122 other buildings) 997th tallest in North America (shared with 31 other buildings) 809th tallest in the United States (shared with 29 other buildings) 122nd tallest in Chicago (shared with 2 other buildings)70th tallest built in 1999 (shared with 2 other buildings) 4th tallest built in North America in 1999 (shared with 2 other buildings) 4th tallest built in the United States in 1999 (shared with 2 other buildings) Tallest built in Chicago in 1999439th most northern skyscraper 6274th most southern skyscraper 346th most western skyscraper 6367th most eastern skyscraper36th tallest within 1 kilometre 122nd tallest within 10 kilometres (2 equally tall buildings in that area) 122nd tallest within 100 kilometres (2 equally tall buildings in that area) 303rd tallest within 1000 kilometres (6 equally tall buildings in that area) 820th tallest within 2000 kilometres (26 equally tall buildings in that area) 1085th tallest within 5000 kilometres (31 equally tall buildings in that area)24th most floors within 1 kilometre (2 buildings with same floor number) 59th most floors within 10 kilometres (4 buildings with same floor number) 59th most floors within 100 kilometres (4 buildings with same floor number) 112th most floors within 1000 kilometres (15 buildings with same floor number) 283rd most floors within 2000 kilometres (39 buildings with same floor number) 366th most floors within 5000 kilometres (53 buildings with same floor number)70 metres from the closest taller building