Koln House Luxury Residence – Hahnwald, Cologne, Germany The Pinnacle List Source Photos See more: Koln House Luxury Residence – Hahnwald, Cologne, Germany ๐ฉ๐ช ArchitectureClean LinesConversational ElementsCourtyardsElevated Design FeatureIndoor Outdoor DesignIndustrial SpacesLinearNatural ElementsOpen ConceptSeamless TransitionsSwimming PoolsUltra ModernUnified Design