Arabs, [253 et seq.], [294; culture of], [267]

Arbela, battle of, [147], [431]

Arcadius, [230], [431]

Archangel, [419]

Archimedes, [151]

Ardashir I, [241], [430]

Argentine Republic, [396]

Arians, [224]

Aristocracy, [130]

Aristotle, [142], [144], [146], [256], [282], [294], [295], [356], [370]