The interior of the existing building dated 1980 was redesigned to accommodate the requirements for the German headquarter for Citibank in Frankfurt. The design brief included the entrance hall, staff restaurant, cafeteria and office areas over 11 floors. The offices have been designed with maximal transparency through full height glazed office partitions in-between individual offices. Glass has also an important design focus in the entrance hall. The walls and ceilings are clad in backlit etched glass panels, while the precast concrete columns and the natural stone flooring create a delightful contrast to the sleek wall covering.