Collections of Spanish Manuscripts Online
PARES--Portal de Archivos Españoles.
By far the largest online collection of manuscript archival documents in Spanish from the medieval, early-modern and modern periods. Includes documents from Spain as well as from its former colonies in the Americas. Sponsored by Spain’s Ministry of Culture.
To read instructions on how to use the collection’s database, go to: http://pares.mcu.es/ParesBusquedas/PARES_Busqueda_Avanzada.pdf
To access the collection’s database search page directly, go to: http://pares.mcu.es/ParesBusquedas/servlets/Control_servlet?accion=100
Corpus de Documentos Españoles Anteriores a 1700—Published by Grupo de Investigación de Textos Para la Historia del Español. The Corpus includes a large number of rigorous transcriptions of Spanish manuscripts from the Middle Ages and the Early Modern Period.
http://www.textoshispanicos.es/index.php?option=com_content&task=view&id=180&Itemid=114
General estoria—Website of Fundación Castro about the production of the 10 volume critical edition of the ‘General Estoria”, medieval chronicle written and published under the leadership of King Alfonso El Sabio. The Castro Library consists of editions of distinguished and/or rare Spanish authors.