FCC Construcción

The new parliamentary seat, promoted by the Castilla y León Council, is situated in the expanding developed area of Valladolid known as Villa del Prado, with its main façade looking out over the Avenida de Salamanca, which is the corridor through the city and Valladolid's gateway to the south. The southern face of the building opens onto a recently built square, the Plaza de las Cortes.

The project was designed by Granada architect Ramón Fernández Alonso and directed under the supervision of architects Leopoldo Cortejoso and Juan Coronado, who live in Valladolid themselves.

The 170-metre-long, 50-metre-wide building comprises four volumes and has a floor area of 30,000 m². The first volume, which has a rectangular floor plan, features three floors and a white concrete front. Horizontal designs clearly predominate in this volume's geometry, accentuated only by the volume housing the parliamentary chamber. The second volume is the library, whose horizontal slats of aluminium and glass shield the building from exposure to the sun. The third volume holds the parliamentary chamber and constitutes the building's main section. From the main façade it looks like a huge glass cube, 29x28 metres on the bottom and 28.40 metres tall. Inside two spaces can be found, a lower space, where parliamentary activity takes place, and an upper space that, like a huge lamp, shines daylight into the chamber, which is made entirely of alabaster. The outside face has been designed in silk-screened glass using digitalised alabaster images. The fourth volume is a glass construction with a two-story curtain wall standing 150 metres long and 10 metres tall.