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In page Alexanderplatz:

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In May 2007, the Texas property development company Hines began building a six-story commercial building named die mitte.[6] The building was built on a plot of 3,900 m2 (42,000 sq ft), which, according to the Kollhoff plans, closes the square to the east and thus reduces the area of the Platz. The building was opened on 25 March 2009.[citation needed]