Ricardo Vaz and Joao Pedro Falcao de Campos built a pavilion on the esplanade along the River Tejo 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 result is an alternating rhythm of plane and relief, a play between closed and open. That play is reinforced by the fact that the glass of the long elevations can be completely slid open between the top and bottom sections which extend beyond the volume, whereupon the pavilion becomes an outdoor bar. Any functions that might detract from the openness and the pattern of profiles like the kitchen and toilets, have been tucked out of sight below the ground.