Council of Nicaea: Did you mean...?

Although both the Byzantines and the Armenians were Christian, the types of Christianity they professed had important differences that led to a lack of recognition and tensions between the two...

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...

Map showing the spread of Christianity, showing both strongly Christianized areas before 325 CE and generally Christianized areas until 600 CE. The map also shows major Christian centers and the cities in which...

An image showing the Council of Chalcedon painted by Vasily Surikov in 1876. Oil on Canvas. The Council of Chalcedon was called in 451 by the Roman Emperor Marcian to settle debates that had begun at two earlier meetings in...

A 15th century CE illustration by Jean Colombe of the Council of Clermont of November 1095 CE where Pope Urban II (r. 1088-1099 CE) famously called for the First Crusade (1095-1102 CE). (National Library, Paris)

Council of Trent (1545-1563), fresco by Pasquale Cati, 1588. Basilica of Santa Maria in Trastevere.

Cardinal Ercole Gonzaga Presiding at the Council of Trent, painting by Elia Naurizio (1589-1657). Diocesan Museum Francesco Gonzaga, Mantua.

An image of the fresco depicting the Council of Chalcedon that was called in 451. Created by Dionisius (1444-1502) around 1520. Ferapontov Monastery, Ferapontovo, Vologda Oblast, Russia.

Pope Pius IV promulgates the bull Benedictus Deus, ratifying the Canons of the Council of Trent in 1564. Fresco by Pasquale Cati, 1588. Altemps Chapel, Santa Maria in Trastevere, Rome.

A depiction of the Coup of 18 Brumaire; the deputies of the Council of 500 rush to accost Napoleon Bonaparte, who is surrounded by his loyal grenadiers; his brother Lucien Bonaparte stands at the president's...