First Council of Nicaea: Did you mean...?

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 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 Council of Chalcedon was called in 451 CE by the Roman Emperor Marcian (r. 450-457) to settle debates regarding the nature (hypostases, "reality") of Christ that had begun at two earlier meetings in Ephesus (431 CE and...

The Council of the Indies (El Real y Supremo Consejo de las Indias) operated from 1524 to 1834 and was the supreme governing body of the Spanish Empire in the Americas and Spanish East Indies. Reporting directly to the monarch...

The Council of Trent (1545-1563) was a meeting of Catholic clerics convened by Pope Paul III (served 1534-1549) in response to the Protestant Reformation. In three separate sessions, the council reaffirmed the authority of the...

The Council of Clermont in central France was held in November 1095 and witnessed Pope Urban II's (r. 1088-1099) historic call for the First Crusade (1095-1102) to capture Jerusalem for Christendom from its Muslim occupiers...

The Canons of the Council of Trent (1545-1563) were rules one was expected to follow in order to be a member of the Catholic Church and, according to the Church's teachings, merit the grace of God and eternal life...

The First Battle of Bull Run (First Manassas) on 21 July 1861 was the first major battle of the American Civil War and a wake-up call for both sides which, until...

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...

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...