The Torre Agbar, or Agbar Tower, is a 21st century skyscraper at Plaça de les Glòries Catalanes, Barcelona, Catalonia, Spain. It was designed by French architect Jean Nouvel and built by Dragados. It opened in June 2005 and it 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 Aguas de Barcelona.

According to Nouvel, the shape of the Torre Agbar was inspired by the mountains of Montserrat that surround Barcelona, and by the shape of a geyser of water 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'obús" (the shell) and some more scatological ones. 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 unique 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 glass blinds of the facade of the building, reducing the consumption of energy for air conditioning. It will house the head office of the Aigües de Barcelona Group (Spanish: "Aguas de Barcelona", English: "Waters of Barcelona"). (www.wikipedia.org)