Manuel Arias Martínez, head of Collections and deputy director of the Museo Nacional de Escultura, specialises in the Spanish Renaissance, particularly Alonso Berruguete, Juan de Juni and Gaspar Becerra, the subject of his doctoral thesis. His publications include El marquesado de Astorga: arquitectura, coleccionismo y patronato (2005) and Alonso Berruguete. Prometeo de la escultura (2011).