Odenathus of Palmyra, 431
Odoacer, 236, 431
Odyssey, 127
Ogdai Khan, 287, 289, 432
Oglethorpe, 336
Okapi, 397
“Old Man,” 372, 373
Old Testament, 115, 116
Olympiad, first, 176, 429
Olympian games, 131
Olympias, Queen, 146
Omar, Caliph, 431
Open-hearth process, 359
Orange