Willis Tower of the four categories in 2004 to become recognized as the tallest building in the world. Taipei 101 surpassed the Petronas Twin Towers in spire height and the Sears Tower in roof height and highest occupied floor. The Sears Tower retained one record: its antenna exceeded Taipei 101's spire in height. In 2008, the Shanghai World Financial Center claimed the records of tallest building by roof and highest occupied floor. On August 12, 2007, the Burj Khalifa in Dubai, United Arab Emirates was reported by its developers to have surpassed the Sears Tower in all height categories. Upon completion, One
Joshua Sears Building "SEARS". The second entrance is centered on the east facade and bears many of the same features: pressed metal pediments, etc. The Sears Building was built in 1891 by Boston millionaire, philanthropist and Kirkland investor Joshua Montgomery Sears as part of the speculative land boom following Peter Kirk's proposal of building a steel producing mecca that would rival Pittsburgh on the east side of Lake Washington. The building cost $18,000 to build, at the time the most expensive being built in Kirkland outside of the steel mill itself. The bricks were pressed from local clay at Peter Kirk's own brick