The office of advertising agency Wieden+Kennedy is located in two national monuments on the Herengracht. After centuries of additions, extensions, and renovations, the two canal houses had merged with different floor heights, facades, and construction methods. The buildings had no mutual coherence, comfortable climate control, clear routing, and clear differences in level. After extensive studies of old drawings, a structure of former light courts floated to the surface in the dark heart of the two buildings. This discovery gave opportunity to several large-scale interventions that could be strongly substantiated historically. By untangling this monumental knot, a modern and vibrant creative work environment of the 21st century has emerged.