The WZB Wissenschaftszentrum was designed by James Stirling and Michael Wilford and completed in 1988. The WZB was the largest non-housing complex in the IBA (Internationale Bauausstellung) programme. Stirling's concept was to create "a friendly, non-bureaucratic place" that looked more like a college than an office building. The implementation of this idea took place in a complex of buildings grouped around the former Imperial Insurance Office by August Busse in 1894. The new buildings reference well known typologies including a hexagonal campanile, a long building with gallery and street facade, a Greek Stoa and a fortified castle. They enclose a picturesque garden and are connected to each other by a system of axes. The elevational treatment of the buildings is relatively uniform with alternating bands of terracotta and sky blue banding for each floor with windows hooded in red sandstone.