Burj Khalifa with Smith's attempts to make the crown more slender. The building opened on 4 January 2010. The tower was designed by Skidmore, Owings and Merrill (SOM), which also designed the Willis Tower (formerly the Sears Tower) in Chicago and the One World Trade Center in New York City. Burj Khalifa uses the bundled tube design of the Willis Tower, invented by Fazlur Rahman Khan. Due to its tubular system, proportionally only half the amount of steel was used in the construction, compared to the Empire State Building. Khan's contributions to the design of tall buildings have had a profound impact
Sears, Roebuck and Company Department Store (Miami, Florida) of the original structure was a seven-story tower. The original department store space had been demolished. The tower was preserved and incorporated it into the new Adrienne Arsht Center for the Performing Arts, built in 2006. The Sears building at one point absorbed a former Burdines department store. The Art Deco building was constructed in 1929, predating the Art Deco hotels on Ocean Drive. Sears, Roebuck and Company Department Store (Miami, Florida) The Sears, Roebuck and Company Department Store in Miami, Florida was an Art Deco building built in 1929 for Sears, Roebuck and Company. The building was the first