Nicaea: Did you mean...?

The Empire of Nicaea was a successor state to the Byzantine Empire, or rather a Byzantine Empire in exile lasting from 1204 to 1261 CE. The Empire of Nicaea was founded in the aftermath of the sacking of Constantinople during the Fourth Crusade...

Icon from the Mégalo Metéoron Monastery in Greece, representing the First Ecumenical Council of Nicaea in 325 CE, with the condemned Arius in the bottom of the icon.

The Christian doctrine of the Trinity (from the Latin trinus, meaning "threefold") professes that there is one God, but three eternal and consubstantial persons (aspects): the Father, the Son, and the Holy Spirit. The Father is the God of...

The Despotate of Epirus was one of the successor states of the Byzantine Empire when it disintegrated following the Fourth Crusade's capture of Constantinople in 1204 CE. It was originally the most successful of those successor states, coming...

Constantine I (Flavius Valerius Constantinus) was Roman emperor from 306-337 CE and is known to history as Constantine the Great for his conversion to Christianity in 312 CE and his subsequent Christianization of the Roman Empire. His conversion...

The Empire of Trebizond was an offshoot of the Byzantine Empire that existed from 1204 to 1461 CE, ruled by the Megas Komnenos Dynasty, descendants of the Komnenos Byzantine emperors. The Empire of Trebizond has been far less researched than...

Osman I, also known as Osman Gazi (c. 1258 - c. 1323 CE), was the founder and first Sultan of the Ottoman Beylik, which would rise to eventually become the Ottoman Empire. He was the ruler of a small Turkic principality among many in the...

Perdiccas (d. 321 BCE) was one of Alexander the Great's commanders, and after his death, custodian of the treasury, regent over Philip III and Alexander IV, and commander of the royal army. When Alexander the Great crossed the Hellespont...

The medieval Church established its monopoly over the spiritual life of Europeans in the Early Middle Ages (c. 476-1000) and consolidated that power throughout the High Middle Ages (1000-1300) and Late Middle Ages (1300-1500). Along the way...

The First Crusade (1095-1102) was a military campaign by western European forces to recapture the city of Jerusalem and the Holy Land from Muslim control. Conceived by Pope Urban II following an appeal from the Byzantine emperor Alexios I...