The national museum of sculpture, housed in the Colegio de San Gregorio, contains a huge inventory of Spanish statuary as well as numerous paintings from various periods. It displays one of the most beautiful collections of polychrome wood statues in Spain, which for the most part date from the 16C and 17C. At the time, Valladolid was the centre of Castilian sculpture, with masters such as Alonso Berruguete, Juan de Juni and Gregorio Fernández.