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In page Alexanderplatz:

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Beginning with the reconstruction of the Kaufhof department store in 2004, and the biggest underground railway station of Berlin, some buildings were redesigned and new structures built on the square's south-eastern side. Sidewalks were expanded to shrink one of the avenues, a new underground garage was built, and commuter tunnels meant to keep pedestrians off the streets were removed.[4] Between 2005 and 2006, Berolinahaus was renovated and later became a branch of the clothing chain, C&A.[citation needed]