Codex Calixtinux

The Codex or Codex Calixtinus Calixtino is an illuminated manuscript Spanish
of the century XII.. Contains sermons, hymns, miracles, stories of the translation of the Apostle, liturgical texts and music pieces related to the Apostle Santiago .
Códice Calixtino - Antifonario Mozárabe\Códice Calixtino - Antifonario Mozárabe

The fifth is a kind of guide for pilgrims following the Way of St. Santiago in Santiago de Compostela travel, tips, and route descriptions of works of art and local customs of the people who lived it along the road.
source : 
http://es.wikipedia.org/wiki/Codex_Calixtinus