The Basque Country University/Euskal Herriko Unibersitatea (UPV/EHU) has just published, in mob format of Microsoft Access with free access, the Inventario digital de la Cartografía Histórica de Euskadi.

The inventory includes 3.391 maps and planes previous to 1900, belonging to 76 national and international archives, which represent everything or a part of the Basque Country territory.

The work is the result of six years of research by  a group managed by Maria Luisa Palanques Salmerón, helped by faculty and student body of Vitoria-Gasteiz Engineering School.

In the image appears the structure of the card. It does not contain any image. 

More information here. People can access to the file since this link.