Nicaea, Nicea, Nikaea or Nikaia (Greek: [place] of victory) may refer to:

Look up Nicaea or Nicea in Wiktionary, the free dictionary.

• Nicaea, an ancient Greek city in northwestern Anatolia
  • Empire of Nicaea
  • See of Nicaea
  • Duke of Nicaea
  • İznik, modern city in Turkey at the site of Nicaea
• Nicaea (Locris), a fortress city of the Locri Epicnemidii, Greece
• Nicaea (Corsica), an Etruscan settlement
• Nicaea (Thrace), a town of ancient Thrace, now in Turkey
• Nicaea, Punjab, a city built by Alexander the Great, now in Punjab, Pakistan
• Nice, France
• Nikaia, Attica, a suburb of Athens, Greece
• Nikaia, Illyria, an ancient Greek colony in Illyria
• Nikaia, Larissa, a town in the Larissa regional unit, Greece

• Nicaea (mythology), a nymph
• Nicaea of Corinth (fl. 245 BC), wife of Alexander of Corinth
• Nicaea of Macedon (c. 335 BC–c. 302 BC), daughter of Antipater
• Nicea (d. 249 AD), Christian martyr
• Cola Nicea (1886–?), Aromanian soldier

• Nikaea (moth), a genus of moth

• Council of Nicaea (disambiguation)

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