The principal church of a diocese, which contains the cathedra, or bishop's chair.Another resource: The New York Carver site has virtual tours of Gothic cathedrals all around the Web, several photo galleries, and a weekly newsletter about medieval architectural history. Also see aisle, apse, architecture, basilica, chapel, clerestory, crocket, cruciform, Gothic, hypostyle hall, Middle Ages, misericord, nave, square schematization, stained glass, trabeation, triforium, and vault.