Maisonette in the Lower Samson 16, Walderarchitects, Walder Architects, Walder, Martin Walder, Architects, Architects, Architekten, Arquitectes, Arquitectos, Architekt, Architect, Arquitecte, Arquitecto, Basel, Barcelona, Sabadell, Architektur, Architecture, Architectura, Concepts, Konzepte, Design, Architecture office, Architekturbüro