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The metropolitan co-cathedral of the Archdiocese of Galveston-Houston (it shares episcopal honors with St. Mary Cathedral Basilica in Galveston; GV12) is a conservative modern building based on a Latin cross plan. Its barrel-vaulted nave evokes the spatial sensations of a nineteenth-or early-twentieth-century American urban Catholic church without attempting to replicate historical architectural detail. Extensive use of Indiana limestone as exterior and interior facing facilitates the reflection and refraction of daylight, which animates the tall, unified space of the nave.