The listed Office Tower on Mellinghofer Straße 55 in Mülheim an der Ruhr stands as one of the region’s most distinctive architectural landmarks. Its striking cylindrical silhouette, elevated above a recessed mirrored level, reflects a rare architectural style from the 1970s. Originally built as the administrative headquarters of Kraftwerk Union (KWU) and later used by Siemens, the tower reflects a significant chapter of Germany’s energy-technology history.

Situated within the FlexCity industrial and business park, it now offers the opportunity to carry this historic structure into a new era - with contemporary workspaces that build on its strong architectural legacy and provide companies with an environment that fosters identity and character.