El mecenazgo librario de los Reyes Católicos: un Psalterium-himnarium para el monasterio de San Juan de los Reyes en Toledo

A detailed analysis of a Graduale and a Psalterium-himnarium, which were prepared under the patronage of the Catholic Monarchs, has allowed a significant number of fragments scattered around the world to be identified as belonging to them, and their provenance to be reassessed. An indepth liturgical-musical study of the Psalterium-himnarium reveals that it belongs to the Franciscan tradition and has uncovered several distinguishing features in its hymn cycle indicating that it was enriched locally through the inclusion of texts and melodies of Spanish origin. Evidence will be presented suggesting that these choirbooks were commissioned for the monastery of San Juan de los Reyes, funded by Ferdinand and Isabella as their royal pantheon, in the context of their active involvement in the struggle between the conventual and observant factions of the Franciscan order.