Koln House Luxury Residence – Hahnwald, Cologne, Germany Source Photos 2,905 See more: Koln House Luxury Residence – Hahnwald, Cologne, Germany π©πͺ ArchitectureClean LinesConversational ElementsCourtyardsElevated Design FeatureIndoor Outdoor DesignIndustrial SpacesLinearNatural ElementsOpen ConceptSeamless TransitionsSwimming PoolsUltra ModernUnified Design