The historical city of Nicea, where early Christian ecumenical councils were held, is in modern-day Turkey on the Marmara and is known by the name İznik.
Iznik
No, the two cities are far apart. Rome is in Italy while Nicaea is/was in present day Turkey.
The Council of Nicaea took place in Nicaea, present day İznikin Turkey
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There was only one Roman empire and Nicaea was a town in the empire. The Christians had their meeting there and that was the place that the Nicene creed, the profession of the Christian faith, was formulated and issued.
Sporus of Nicaea was born in 240.
Sporus of Nicaea died in 300.
Empire of Nicaea ended in 1261.
Empire of Nicaea was created in 1204.
Battle of Nicaea happened in 193.
The Seljuk Turks used Nicaea as the capital of their Seljuk Empire beginning in 1081; in 1097, Nicaea fell back into Byzantine control. In 1204, after the Fourth Crusade, the Laskaris family made Nicaea the capital of their Empire of Nicaea. This empire lasted until 1261.
Constantinople, Andrianople, Brusa,Nicaea, Smyrna, to name a few.