Nicomedia

Place of martyrdom · Imperial capital

ancient city of Bithynia in modern-day Turkey

Location: 40.7625, 29.9175 · Pleiades 511337

What this place is

  • Imperial capital — Diocletian's eastern capital from 286, rebuilt to rival Rome, until Constantine's victory in 324 turned the east towards Byzantium

Who is recorded here

What happened here

In art

About the place

Nicomedia was an ancient Greek city located in what is now Turkey. In 286 AD, Nicomedia became the eastern and most senior capital city of the Roman Empire, a status which the city maintained during the Tetrarchy system.

From Wikipedia, retrieved 2026-08-14 · CC BY-SA 4.0