Two large companies have their headquarters at Aufbau Haus: the Aufbau Verlag Publishing House and Modulor, a materials provider which, as Planet Modulor, provides additional services to the creative and craft industries in the building. The areas of activity of the two main tenants – writing and materials – provided the starting points for the design of the orientation system. Moniteurs’ idea was that the artisans of Planet Modulor should be involved in the creation process.