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🏛️ Nicaea-Juliopolis

Archaeology - Ancient Rome Türkiye Asia

🏛️ Nicaea-Juliopolis
Roman and Byzantine city ruins near İznik, northwestern Turkey


🕐 2 min read · Updated 16 Mar 2026 at 11:25
📌 Fast Facts
  • Located in Bursa Province, 240 km southeast of Istanbul
  • Founded as Nicaea by Antigonus I Monophthalmus (301 BCE); renamed Juliopolis under Roman rule
  • Site of the First Ecumenical Council (325 CE), a foundational Christian synod
  • Partially preserved within the medieval walled city of İznik

Nicaea-Juliopolis was a significant Hellenistic and Roman settlement on the eastern shore of Lake Iznik (Ascania). The city ...

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