brick, 13, 24, 26, 28, 30, 39, 40, 41, 45, 54, 69, 70, 71, 79, 82, 84, 96, 113, 115, 117, 154, 155, 160; enamelled, 122, 123, 140; sun-dried, 38, 68, 75, 146, 147, 148, 153, 154, 160. buttress, 4, 35, 71, 122. buttressing vaults, 14, 26, 35, 74, 75, 95. Byzantine influence, 115, 119, 143, 147. C calotte, 12, 13, 14, 15, 18, 19, 24, 26, 34, 38, 73, 133, 138; construction, 13; laid in rings, 24, 42; stilted, 13. capital, 25, 77; absent, 6, 30, 138, 140; bell-shaped, 156; Corinthian, 135, 141; impost-, of masonry and stucco, 12, 24, 25, 27, 29, 30, 42, 134, 135, 138, 140; Ionic, 65; wreathed acanthus, 153. caravanserai type, 104, 106, 111 n. casemate, 22, 107, 108, 109, 121. castrum, Sasanian, 105. cavetto, 12. cella, 94, 126. centering, 9, 12, 13, 15, 18, 26, 28, 30, 33 nn. 1 and 2, 45, 71, 72, 75, 76, 96, 118, 166. centralization, 129, 131. chapel replacing sacellum, 105. chemin de ronde, 5, 6, 7, 8, 9, 21, 73, 106, 116. chimney, 29, 32, 82. Christian influence, 147, 148, 149. cloister, _see_ arcade. closet, 83, 118. coffering, 140. colonnade, 84, 98, 123, 125. column, absence of, in Babylonia and Assyria, 62, 77; clustered, 24, 131, 135, 158; double, 138; dwarf, 127, 128, 130, 133; engaged, 8, 12, 13, 16, 17, 19, 22, 23, 24, 25, 30, 32, 34, 36, 42, 46, 78, 122, 124, 125, 127, 128, 130, 131, 133, 136; free-standing, 16, 17, 28, 29, 32, 35, 45, 47, 63, 80, 82, 123, 136, 148, 149, 150, 151, 152, 153, 158, 159, 160; of wood, 148, 154, 157, 158, 160; quarter-, in antis, 127, 128, 129, 138. concrete, 28. cornice, 25, 34, 70, 133; broken, 128. courts, isolation of, 31, 33, 48, 49, 83. crémaillère, 106, 108, 109. crenellated motive on archivolt, 14, 18, 140. crenellation, 7, 18, 107, 121, 122, 123, 127, 128, 133, 134, 140, 143. curtain wall, 7, 106 n. 8, 108. cusp, 19, 24, 132, 133, 135, 142, 153. D Days of Ignorance, 56, 120, 168. decoration, continuous niches, 123, 124, 125, 136; continuous pattern, 123, 130, 131, 135, 143; Coptic, 141, 143, 147, 164; derived from wooden structure, 123; geometric, 143; imitative architecture, 65, 77, 123, 124, 125, 127-36; in horizontal zones, 122, 124-36; of structural character, 140. dîwân, 19, 22. djâmi’, _see_ mosque. dog-tooth, brick, 40, 79. dome, 8, 10, 51, 53, 56, 70, 72, 73, 74, 75, 76, 78, 79, 92, 97, 112, 117, 118, 152; fluted, 9, 13, 166; on columns, 71, 72, 73, 74, 78; ribbed, 7, 111; thrust of, concentrated on angle piers, 78, 96. dragon motive, 90, 143. dungeon, 9. Duru, 88. E Egyptian fortification, 106; influence, 127 n. 1; tombs, 124. entablature, 76, 130; broken, 127, 128; Ionic, 127. F