One57A1 vs Sapphire of Istanbul

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One57, formerly known as Carnegie 57, is a 75-story, 1,005-foot (306 m) supertall skyscraper in 157 West 57th Street between Sixth and Seventh Avenues in the Midtown neighborhood of Manhattan, New York City. The construction has 92 condominium units in addition to a new Park Hyatt Hotel with 210 rooms, the flagship Hyatt property.The tower, developed by Extell Development Company and designed by Christian de Portzamparc, was the first ultra-luxury condominium tower along the stretch of 57th Street which was then named Billionaires' Row.

Upon completion in 2014, it was the tallest residential building in the city for a month or two until the completion of 432 Park Avenue.

Source: Wikipedia

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Istanbul Sapphire, or Sapphire, is a skyscraper located in the central business district of Levent in Istanbul, Turkey.

It was Istanbul's and Turkey's tallest skyscraper between 2010 and 2016, and the 4th tallest building in Europe when its construction was finished in 2010. Sapphire rises 54 floors above ground level, and contains an above-ground roof height of 238 meters: the construction has an overall structural height of 261 meters including its spire, which is part of the design rather than a radio antenna. Designed by Tabanl?o?lu Architects, it's a luxury and shopping residence mixed-use development managed by Kiler GYO. It's also the nation's first ecological skyscraper. As of 2020, Istanbul Sapphire is the 4th tallest skyscraper in Istanbul and Turkey, behind Metropol Istanbul Tower 1 (70 flooring / 301 metres including its twin spires) from the Ata?ehir district on the Asian side of the city; and the Skyland Istanbul Towers 1 and 2 (2 x 70 flooring / 293 metres), located adjacent to Türk Telekom Stadium at the Seyrantepe quarter of the Sar?yer district, on the European side.

Source: Wikipedia