The Library of Iberian Resources Online is dedicated to the dissemination of knowledge free of any charge to a world-wide audience. The work that unlies this activity, however, is not without cost. The continuation and expansion of LIBRO's mission depends upon the generosity of individual, institutional and corporate sponsors. Because LIBRO is a project of the American Academy of Research Historians of Medieval Spain, a 501(c)(3) tax-exempt organization as recognized by the U.S. Internal Revenue Service, all contributions to AARHMS and LIBRO are tax-deductible within the United States. For further information, please contact us at: