The Empire of Nicaea (Greek: Βασιλεία Ῥωμαίων) or the Nicene Empire was the largest of the three Byzantine Greek rump states founded by the aristocracy...

early history of the Christian Church), the Nicene Creed (which comes from the First Council), and as the capital city of the Empire of Nicaea following the...

establishment, the Empire of Thessalonica, under the capable Theodore Komnenos Doukas, rivaled the Empire of Nicaea and the Second Bulgarian Empire as the strongest...

The members of the family formed the ruling dynasty of the Empire of Nicaea, a Byzantine rump state that existed from the 1204 sack of Constantinople...

Roman Empire: the Latin empire, the Holy Roman Empire, and the three remnants of the Byzantine Empire, the Despotate of Epirus, the empire of Nicaea, and...

The foundation of Constantinople in 330 AD marks the conventional start of the Eastern Roman Empire, which fell to the Ottoman Empire in 1453 AD. Only...

The First Council of Nicaea (/naɪˈsiːə/ ny-SEE-ə; Ancient Greek: Σύνοδος τῆς Νικαίας, romanized: Sýnodos tês Nikaías) was a council of Christian bishops...

one of three Byzantine successor states to claim the imperial throne alongside the Empire of Nicaea under the Laskaris family and the Despotate of Epirus...

Byzantine successor states were established: the Empire of Nicaea and the Despotate of Epirus. A third, the Empire of Trebizond, was created after Alexios Komnenos...

generals of the Byzantine army and, after John III Doukas Vatatzes intermarried with the Laskaris family, the ruling line of the Empire of Nicaea until the...