With a total area of 300,000 sqm, the listed Airport Tempelhof building is still one of the largest buildings in the world. Since it has been closed to air traffic in 2009, the building is housing offices and event spaces. In 2013, Moniteurs drew up the concept for an overarching guidance and orientation system for the exterior, including the airfield. The planning for the airport building was implemented in 2016. The sign family is simple and robust and integrates well into the public space. The extremely complex terrain and access to it were clearly structured and information hierarchies were developed.