A citadel skyscraper is a type of skyscraper that is designed to be highly secure and defensible. These buildings are typically constructed with thick walls, reinforced concrete, and other materials that can... Read more »
The Citadel, officially 111 West 57th Street, is a supertall skyscraper in Midtown Manhattan, New York City. Designed by Adrian Smith + Gordon Gill Architecture, the 91-story, 1,428-foot-tall (435 m) building was... Read more »
