Thesis advisor: Katherine Nahum / This thesis is a comparison between medieval Christian and Islamic sacred architecture, using the Great Mosque of Cordoba and the Cathedral of Notre-Dame in Chartres as examples. The paper links a formal analysis and comparison of the buildings, including their use of space, light, and decoration to an analysis and comparison of each religion's philosophy and theology. It includes a discussion of the role of Neo-Platonist philosophy on the architecture of each religion. / Thesis (BA) — Boston College, 2007. / Submitted to: Boston College. College of Arts and Sciences. / Discipline: Fine Arts. / Discipline: College Honors Program.