"Los quilates de su oriente": La pluralidad de culturas en la Península Ibérica durante la Edad Media y en los albores de la Modernidad, A Conference in honor of Francisco Márquez Villanueva, presented by Harvard University, Real Colegio Complutense, Faculty of Arts and Sciences, Graduate School of Arts and Sciences, and the Department of Romance Languages and Literatures, Cambridge, Massachusetts, January 17-18, 2003, and organized by Ángel Sáenz-Badillos, Luis M. Girón N