A pavilion on the esplanade along the River Tejo constructed with little more than white-painted, screwed-together steel sections and glass. The steel sections (identical I-sections) are both supporting structure and ‘façade cladding’, since the building is not insulated. Where the façades become roof the pattern changes and glass becomes steel and vice versa. The glass of the long elevations can be completely slid open between the top and bottom sections which extend beyond the volume so that the pavilion becomes an outdoor bar. Any kitchen and plumbing functions are below ground.