 The main building of the school is the Palace of the Counts of Luque, better known as Palace of the Columns, of architect unknown (although some attribute it to Juan de Villanueva).It was restored in 1946 by architects Luis Álvarez de Cienfuegos and Juan de Dios de Wilhelmi so it could host the Faculty of Philosophy and Letters ("Facultad de Filosofía y Letras"), later the Institute of Languages ("Instituto de Idiomas") and, since 1979, the Faculty of Translation and Interpreting.The name "Palacio de las Columnas" was probably inspired by the Doric and Ionic columns that decorate its facade.