Citadel Center is a 580ft (177m) tall skyscraper in Chicago

Chicago

Chicago is the largest city in the US state of Illinois. With nearly 2.7 million residents, it is the most populous city in the Midwestern United States and the third most populous in the US, after New York City and Los Angeles...

, Illinois

Illinois

Illinois is the fifth-most populous state of the United States of America, and is often noted for being a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal,...

, designed by Spanish-Catalan architect Ricardo Bofill

Ricardo Bofill

Ricardo Bofill, also Ricard Bofill Leví is a Catalan Spanish postmodernist architect.He studied at the School of Architecture in Geneva, Switzerland...

. The 44th tallest building in Chicago was completed in 2003 and has 39 floors. A limited-edition cast of the Winged Victory of Samothrace

Winged Victory of Samothrace

The Winged Victory of Samothrace, also called the Nike of Samothrace, is a 2nd century BC marble sculpture of the Greek goddess Nike . Since 1884, it has been prominently displayed at the Louvre and is one of the most celebrated sculptures in the world.-Description:The Nike of Samothrace,...

, one of the world's most famous sculptures, is the showpiece of the main lobby. It was the first building in Chicago to use a raised-floor pressurized plenum system. This allowed for air to be pumped in through the floors for individuals to control their climates using floor diffusers.