Oppido, III, 251, 282, 284.
Orano, 116, 122, 292; II, 362; III, 426.
Ordona, II, 312.
Oreto, fiume, L; II, 68, 299, 300, 301; III, 103, 118, 470, 580, 582, 785, 790, 849, 883.
Oria, II, 170, 171, 172, 175, 316.
Oriente, II, 100, 101, 102, 104, 134, 178, 221, 227, 255, 269, 278, 282, 286, 361, 362, 365, 404, 446, 474, 481, 495, 496, 498, 504, 518, 519, 522, 533; III, 14, 25, 315, 324, 328, 447, 513, 535, 541, 669, 694, 713, 728, 731, 732, 733, 774, 802, 807.
Orne (dipartimento dell’), III, 497.
Oronte, III, 634.
Orta, II, 164.
Ortigia, 7, 394, 395, 397; II, 259, 391.