The Torre Agbar, or Agbar Tower, is a 21st-century skyscraper at Placa de les Glories Catalanes, Barcelona, Catalonia, Spain. It was designed by French architect Jean Nouvel in association with the Spanish firm b720 Arquitectos and built by Dragados. It opened in June 2005 and was inaugurated officially by the King of Spain on 16 September 2005. The Torre Agbar is located in the Poblenou neighborhood of Barcelona and is named after its owners, the Agbar Group, a holding company whose interests include the Barcelona water company Aigues de Barcelona.
According to Jean Nouvel, the shape of the Torre Agbar was inspired by Montserrat, a mountain near Barcelona, and by the shape of a geyser rising into the air. Jean Nouvel, in an interview, described it as having a phallic character. As a result of its unusual shape, the building is known by several nicknames, such as "el supositori" (the suppository), "l'obus" (the shell) and some more scatological ones. It is also somewhat similar in shape to Sir Norman Foster's 30 St. Mary Axe in London, often called "the Gherkin". It has 30,000 m2 (323,000 ft2) of above-ground office space, 3,210 m2 (34,500 ft2) of technical service floors with installations and 8,351 m2 (90,000 ft2) of services, including an auditorium. The Agbar Tower measures 144.4 m (473.75 ft) in height and consists of 38 storeys, including four underground levels.
Its design combines a number of different architectural concepts, resulting in a striking structure built with reinforced concrete, covered with a facade of glass, and over 4,500 window openings cut out of the structural concrete. The building stands out in Barcelona; it is the third tallest building in Barcelona, only after the Arts Hotel and the Mapfre Tower, both 154 m (505.25 ft).
A defining feature of the building is its nocturnal illumination. It has 4,500 LED luminous devices that allow generation of luminous images in the facade. In addition, it has temperature sensors in the outside of the tower that regulate the opening and closing of the window blinds of the facade of the building, reducing the consumption of energy for air conditioning. It houses the head office of the Aigues de Barcelona Group, the water supply company of Barcelona.