Union Investment Institutional, a private equity firm, completed the acquisition of Cäcilium, an office building complex, from Blackstone. Financial terms were not disclosed. “Cäcilium is an architecturally timeless and flexible building in a very good downtown location in Cologne and is geared to the needs of quality-conscious tenants. The property’s corner location ensures exceptionally high visibility,” Wolfgang Kessler, Union Investment Senior Managing Director.