This multifunctional building in Valladolid (Castile and Leon) was designed in the shape of a dome, with a diameter of 46,5 m., rising 15 m. high and with a total surface of 1.500 square meters. Being multifunctional, it can hold tennis and basketball matches, padel, circus, plays, concerts, exhibitions, fashion shows, small congresses, fairs, etc. It has a capacity form more than 1.000 spectators and the stage is versatile. It is made of a metallic structure covered with a skin of carbon fiber and EFTE. It is a smart building.