The Association of Provinces of the Netherlands (IPO) occupies an off ice with two faces on Herengracht in The Hague. A second, featureless office building was built behind the heritage building. The challenge here was to combine the two volumes in a single entity and, at the same time, foster new collaboration among the staff . Clean-lined additions to the monumental structure at the front and contemporary, monumental additions to the rear structure create unity, which is enhanced through subtle colour combinations. Various spaces for encounter encourage contact among employees. A New Way of Working in classically modern surroundings.