Torre Telefónica Diagonal ZeroZero, designed by Enric Massip-Bosch, developed by the Free Zone Consortium to house Telefónica's corporate offices in Barcelona and built by FCC, won the 2010 Quatrium Prize for the Best Architectonic Project. The Quatrium Prize is given by the Vía Group, a publishing and communications conglomerate specialising in the real estate, construction, architecture, interior design and hotel sectors.

The 24-story Telefónica building stands at the start of Avenida Diagonal, facing the sea. It rises 110 metres into the air as a rhomboidal volume, which, as the Consortium has explained, is destined to be a "new icon" of the city and its skyline.

The tower, developed by Telefónica, required an investment of over 60 million euro. It will hold Telefónica's corporate offices and will be one of the multinational's most important centres of innovation in Spain, once work on the building finishes next summer.