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Ortelius, Abraham (2)
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Ortelius, Abraham, 1527-1598 (1)
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Orton (1)
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Osaka (Japan) Maps (1)
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Osborne Keen, John, 1846-1923 (1)
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Osiris (1)
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Otescu, Ion Nonna, 1888-1940 (2)
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Otterburn, Battle of, Otterburn, England, 1388 (20)
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Otterburn, Battle of, Otterburn, England, 1388, in literature (3)
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Otto I, Holy Roman Emperor, 912-973 (1)
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Otto II, Holy Roman Emperor, 955-983 (1)
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Otto III, Holy Roman Emperor, 980-1002 (1)
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Otto IV, Holy Roman Emperor, approximately 1175-1218 (1)
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Ottoman Empire (3)
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Ouless (1)
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Overmeer Fisscher, J. F. van, 1800-1848 (1)
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Overton, Frederick (1)
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Overton, H (1)
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Ovid, 43 B.C.-17 A.D. or 18 A.D. (4)
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Ovid, 43 B.C.-17 or 18 A.D (1)
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