Architecture of Chicago a new structural system of framed tubes in skyscraper design and construction. The first building to apply the tube-frame construction was the DeWitt-Chestnut Apartment Building which Khan designed and was completed in Chicago by 1966. This laid the foundations for the tube structures of many other later skyscrapers, including his own constructions of the John Hancock Center and Willis Tower (then named the Sears Tower) in Chicago and can be seen in the construction of the World Trade Center, Petronas Towers, Jin Mao Building, and most other supertall skyscrapers since the 1960s. Willis Tower would be the world's tallest building
Tower Life Building Tower Life Building The Tower Life Building is a landmark and historic building in Downtown San Antonio, Texas, USA. Construction of the tower began in 1927 and the building rises 403 feet (123 meters) and has 30 floors. The building, which opened in 1929, was originally named the Smith-Young Tower and is the central component of a partially completed development called the Bowen Island Skyscrapers. The eight sided, neo-gothic brick and terra-cotta tower (complete with gargoyles) was designed by noted local architectural firm Ayres & Ayres (Atlee & Robert M. Ayres). The building also housed San Antonio's first Sears, Roebuck