The Royal Vault of the Escorial, within whose circular walls repose the Kings and Queens of Spain.

The Royal Vault of the Escorial, within whose circular walls repose the Kings and Queens of Spain., H-304, Box: 3. Hispanic Society of America Postcard Collection, BENSON-MS Hispanic Society of America. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/295873 Accessed September 25, 2026.