Commerzbank Tower

At 56 stories and just under 1,000 feet, the Commerzbank Tower in Frankfurt is Germany's tallest building and the second tallest in the European Union. Height is not the only distinguishing feature of the Commerzbank Tower. As this illustrated guide to its design and construction reveals, this iconic structure is also the world's first ecological high-rise office building. This sleek and beautifully designed book explores every aspect of Foster's pioneering project-from the central spiraling atrium, which allows for natural light and ventilation, to the outside gardens that give the building a sense of airiness and transparency. One of Foster + Partners' most influential projects, this tower wields a low impact on the environment while offering the neighborhood an attractive site for cultural events.