sentences:  Once there, he occupied himself by arranging and cataloguing the collection at the newly established Real Museo de Pinturas y Esculturas (now the Museo del Prado), on behalf of King Fernando VII.The catalog included lithographs of the paintings, marking the first major use of this technique in Spain.In 1823, he was named Director of the San Fernando academy and, in 1838, became Director of the Museo del Prado; a position he held until 1857 when he resigned in the face of some Royal criticism.