Columbia subject headings:
Architecture--Spain--San Lorenzo del Escorial--History--Early works to 1800.
Archivo General de Simancas. Manuscript. Casa y sitios reales, leg. 258, fol. 488.
Manuscripts, Spanish--Spain--Simancas.
Harvard subject headings:
Princeton subject headings:
Architecture.
Cranes, derricks, etc.
Herrera, Juan de, approximately 1530-1597. Architetura y machinas.