Aisles, walls of, strengthened to resist thrust of vaulting, i. 53; apsidal, ii. 93, 110, 162, 165, 183, 203. Aix-la-Chapelle, treasuries at, i. 328; Charlemagne’s church, ii. 260, 276. Alaric, invasion of, ii. 13. Alban, St., shrine of, i. 187; ii. 95, 100. Alban’s, St., Cathedral, i. 31, 184, 314; ii. 94, 118, 122; western portals, i. 126, 144, 167; shrine of the proto-martyr, 187; ii. 95, 100. Trumpington’s work, i. 286; eastern parts of, 286, 343; Roman brick, ii. 75; piers, 78; transepts, aisles of, 90; plan, 96, 115; choir, 101; tower, 103; Abbot Paul’s work, 104; central tower, 107, 118, 135. Alexandria, ii. 264. Alfred, King, ii. 32, 58, 59. Alphege, ii. 59. Altar-coverings, i. 329. Altenburg cloisters, i. 129. Amiens Cathedral, i. 18, 95, 129, 141, 174, 326; façade, 165; western portals, 258. Amphibalus, St., shrine of, i. 185. Andernach, western façade, i. 129, 140. Angels, carved in arch mouldings, i. 80; in spandrils of transepts, Westminster Abbey, 312. Angevine, district of, i. 326. Angles invaded Britain, ii. 9. Anglo-Saxon, characteristics of, ii. 14, 36, 46, 134, 298; details of early Irish remains compared with, 22; churches, plans of, 38; pillars, columns, etc., 39; towers at Brixworth, 40; church at Bradford, Wilts, 46; chancel, Jarrow-on-the-Tyne, 36, 47; church at Worth, 44; church at Dover, 41; churches, Monk Wearmouth and Deerhurst, 36; church at Stow, 50; bell-towers, 52; crosses, 57; duration of, and classification into divisions, 58; post-conquestal, 59, 72; doorways compared with Norman, 76; Gloucester, 121. Angoulême, domical architecture, i. 99; ii. 274, 275. Angoumois, domical churches, i. 76. Anjou, i. 75. Annulus, in vaulting, i. 57. Antiquarianism, i. 334, 345. Antiquaries, their works, i. 27. Apostles, church of the, at Constantinople, ii. 249, 264-266. Apse, in early British churches, ii. 20; at Winchester, 34; Worth church, 45; Jarrow-on-the-Tyne, 47; in Norman, 89; at Caen, 96; groining to an, 172, 183; at Westminster, 205. Apsidal termination, unknown in the early churches of Ireland, ii. 17; to Lanfranc’s Cathedral at Canterbury, 28, 29; at Brixworth, 32, 40; at Wing, 51; chapel, Tower of London, 93, 162, 277; St. Alban’s, 96, 118; Ely, 110, 113; Norwich, 118; Gloucester, 122. Aqueducts, Roman, ii. 73, 138. Aquitaine, churches of, i. 152, 337; ii. 276. Arcades, miniature, in parapets, i. 258; ii. 139, 140. Arch, transitional mouldings, i. 125; ribs, 53, 146; outward pressure of round, 233; system of mouldings, 248; orders, tracery of windows always viewed as, 284. Arch decoration, Romanesque, i. 225; ii. 76, 120, 139, 141. Archæological portions of our studies, i. 335. Archaic art, ii. 4. Arched construction, i. 45, 46, 47; ii. 177.