The document describes the curtain wall and wall cladding of the Torre Agbar Tower in Barcelona, Spain. It is a 31-story bullet-shaped tower with a reinforced concrete structure containing 4,500 individual window openings. The custom curtain wall system uses clear and translucent glass louvers suspended on extruded aluminum framing in front of the load-bearing concrete wall. It contains 4,400 windows and 56,619 transparent and translucent glass plates in different colors that help deflect direct sunlight.