Nikaia

Nicaea was originally named Ancore or Helicore before being refounded as Antigoneia by Antigonus I Monophthalmus.

The Nicene Creed, which became the foundation of church doctrine, was adopted at the first Roman Ecumenical Christian council in Nicaea in 325.

The ancient walls of Nicaea, built in the 4th century, have a circumference of 3,100 m and are formed of alternate courses of Roman tiles and large square stones.

The Church of the Dormition, a significant Byzantine church in Nicaea, was destroyed by the Turks in 1922, leaving only lower portions of its walls.

Hipparchus, a Greek astronomer, geographer, and mathematician, is one of the notable people from Nicaea.