Maisonette in the Lower Samson 19, 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