Pitagoras Arquitectos studio has implemented the project of the modern L23 mansion in Guimaraes, Portugal. L23 looks closed and dark from the roadside but it doesn’t corresponds to reality. Open floor plan, panoramic windows, terrace and courtyard create enough space and natural light. A living room, dining room and spa area with a pool and gym are on the first floor; the bedrooms and recreation room are on the second. L23’s interior is elegant and simple. One distinguish feature is the ordinary concrete surfaces without plaster and paint. The majority of flooring material for balconies and terraces are made of wood of the same breed as was used for living area. It helps visually expand the space.