The City of Capitals () is a mixed-use complex composed of two skyscrapers and an office building located on plot 9 in the Moscow International Business Center in Moscow, Russia with a total area of . The two skyscrapers are named after the two historical capitals of Russia: Moscow and Saint Petersburg. Construction of the complex began in 2005, with the office building completed in 2008 and the two skyscrapers completed in 2009. Moscow Tower is the taller of the two skyscrapers, with a height of and 73 stories, surpassing the Naberezhnaya Tower as the tallest building in Russia and Europe in 2008, until it was surpassed by The Shard in London, United Kingdom in 2012. St. Petersburg Tower has a height of and 65 stories while the office building serves as a stylobate with a height of with 18 floors. As of 2022, Moscow Tower is the eighth-tallest building in Russia and the 21st-tallest residential building in the world. History Construction of the complex was first proposed in 2003. Due to the Capital City complex needed to be built in a quick schedule, a design team was gathered from a span of 11 time zones from Seattle to Moscow. An obstacle for planning of the skyscraper was the absence of applicable local building codes since the current codes dated back to 1950 did not apply for tall buildings. As a result, codes of the complex were modeled off after British standards, which established high standards for fire safety, such as 4-hour structural fire resistance and the use of 30-minute fire-rated glass. According to the schedule, NBBJ and the Arup Group are to focus on completing the structural design while the architectural design is being worked on. After this is completed, the design team worked with the Moscow government to fulfill the building codes for the complex. Construction of the complex started in 2005. The office building which served as a stylobate for the complex was completed in 2008. In July 2008, the Moscow Tower surpassed the Naberezhnaya Tower as the tallest building in Russia and Europe. In 2009, construction of the complex was completed. In 2012, The Shard in London, United Kingdom surpassed Moscow Tower as the tallest building in Europe, but only held that position for a few months as the Capital City complex's neighboring Mercury City Tower surpassed The Shard's height. Design According to Yuri Starodubtsev of