Project considerations involved harmonizing the tower's design with the landscape of the Rhein River and the architecture of the adjacent German International Broadcaster Deutsche Welle building. Because there were virtually no other high-rise buildings in Bonn, the surrounding landscape was considered and the tower was designed so as to not feel overbearing to the neighboring residents. On the other hand, the requirements for a contemporary office building also had to be considered, as it was essential to create a comfortable space for those who work there and an environment conducive to efficient communication.

Responding to all of these conditions, Helmut Jahn and Werner Sobek proposed a slender high-rise building 162.5 meters high that consisted of two thin half-lens-like level-surfaced towers separated from each other and connected with a void in between, and accompanied by a low-rise building at the base. The 41-story high-rise building consists of a cluster of office space created along the arc-drawn façade and another cluster of office space with executive suites and executive conference rooms on the top level. The 3-story high conference building consists of a cafeteria and meeting space.
For the elliptical high-rise building, the seven mountains of "Sieben-Gebirge", from which folk tales such as "Snow White and the Seven Dwarves" were born, were taken into consideration from a landscape perspective and the direction of the long axis was ultimately checked by a wind-tunnel test. Between the two towers that are completely enveloped with a double-skin glass façade runs a huge atrium space, named the Sky Garden, which gives the building a translucent feel. In addition to this, because the top portion of the façade consists of a fence made solely of glass, it looks as though the building is dissolving into the sky.