Ancient history
HistoryModernAncient historyArchaeologyContemporaryPost-classicalIndian historyEarly modernAncientHistory by country, small region and cityFrom Lably lessonsHistory by topicHistorical cities, towns and archaeological sitesBasicsPrehistoryHistory by countryHistorical citiesModern historyHistory by subject matterPost-classical historyHistory by continent and large regionAuxiliary historical sciencesHistory & CivicsHistory by subjectHistory by continent and regionHistory by ethnicityHistory by regionGeneral
O
- ObeliskTapered four-sided stone monument
- Obsidian use in MesoamericaObsidian is a naturally formed volcanic glass that was an important part of the material c
- Obverse and reverseFront and back sides of coins and other two-sided objects
- Odes (Horace)Latin poetry collection
- OedipusMythical Greek king of Thebes
- Officium (ancient Rome)Officium (pl.: officia) is a Latin word with various meanings in ancient Rome, including "
- Ogdoad (Egyptian)Group of 8 deities in Ancient Egyptian religion
- OikeiôsisConcept in Stoic philosophy
- Old Testament messianic prophecies quoted in the New TestamentThe books of the New Testament frequently cite Jewish scripture to support the claim of th
- OltosOltos was a Late Archaic Greek vase painter, active in Athens from 525 BC to 500 BC. About
- Onesimos (vase painter)Onesimos was an ancient Athenian vase painter who flourished c. 500–480 BC. He specialized
- Opening of the mouth ceremonyAncient Egyptian funerary rite
- Opet FestivalAncient Egyptian festival
- Optative (Ancient Greek)The optative mood ( or ; Ancient Greek [ἔγκλισις] εὐκτική, [énklisis] euktikḗ, "[inflectio
- OracleProvider of prophecies or insights
- OrestesFigure in Greek mythology
- Orestes PapyrusAncient Greek musical fragment
- Orientalizing periodThe Orientalizing period or Orientalizing revolution is an art historical period that bega
- Orion correlation theoryFringe hypothesis in alternative Egyptology
- OrnithomancyOrnithomancy (modern term from Greek ornis "bird" and manteia "divination"; in Ancient Gre
- Orphic HymnsCollection of 87 ancient Greek hymns
- Osiris mythStory in ancient Egyptian mythology
- Osorkon the ElderEgyptian pharaoh
- OstraconBroken piece of pottery with inscription
- Ottoman conquest of LesbosThe Ottoman conquest of Lesbos took place in September 1462. The Ottoman Empire, under Sul
- Ottoman GreecePeriod of Ottoman rule of Greece
- Oude Rijn (Utrecht and South Holland)The Oude Rijn ("Old Rhine") is a branch of the Rhine delta in the Dutch provinces of Utrec
- OuroborosSymbolic serpent with its tail in its mouth
- Overview of resurrection appearances in the Gospels and PaulComparison of post-resurrection appearances of Jesus
- OvidaOvida or Odiva (died 481/482) was a late Western Roman general and warlord of likely Gothi
- OxyrhynchusCity in Ptolemaic/Roman Egypt