Aries, constellation of, [51]
Aristotle, on slavery, [61]
—— study of, [196], [227], [233], [235]
Arithmetic, introduction of, [233]
Arius and Arianism, [118], [120]–23, [126], [135], [136], [142] sq., [145], [174]
Armenia, conversion of, [127]; reconquest of, [239]
—— Nestorians in, [47], [147]; heresy in, [198]–99
Arminianism, [268]
Arnobius, [86]
Arnold of Brescia, [200]