Category
page 1Filioque
East-West Schism
division of Christianity into two large parts in 1054
Leo III
Pope of the Catholic Church from 795 to 816 (born 750–816)

Karl Barth
Swiss Protestant theologian (1886-1968)
Nicene Creed
statement of belief adopted at the First Ecumenical Council in 325
Western Christianity
Christianity originating from the tradition of the Western Roman Empire, with its capital in Rome. consists of the Latin Church of the Catholic Church and its derivatives

Photios I of Constantinople
9th Century Ecumenical Patriarch of Constantinople
filioque clause
thumb|The Holy Spirit coming from both the Father and the Son, detail of the Boulbon Altarpiece, . Originally from the high altar of the Chapelle Saint-Marcellin, Boulbon, France, now in the [[Louvre, Paris.]]
Council of Florence
Ecumenical Council of the Catholic Church (1431–1445)
Second Council of Lyon
fourteenth ecumenical council of the Catholic Church
Michael I Cerularius
Ecumenical patriarch of Constantinople
Fourth Council of Constantinople (Roman Catholic)
8th ecumenical council of the Catholic Church; held in Constantinople 869 to 870
Mark of Ephesus
archbishop of Ephesus
Fourth Council of Constantinople (Eastern Orthodox)
synoz convoked by Byzantine Emperor Basil I and held in 879–880
Ratramnus
Ratramnus (died ) was a Frankish monk of the monastery of Corbie, near Amiens in northern France, and a Carolingian theologian known best for his writings on the Eucharist and predestination. His Eucharistic treatise De corpore et sanguine Domini (On the Body and Blood of the Lord) was a counterpoint to his abbot Paschasius Radbertus’s realist Eucharistic theology. Ratramnus was also known for his defense of the monk Gottschalk, whose theology of double predestination was the center of much controversy in 9th-century France and Germany. In his own time, Ratramnus was perhaps best known for his
John XI of Constantinople
Patriarch of Constantinople
Photian schism
9th-century schism between Rome and Constantinople
Third Council of Toledo
synod
Council of Frankfurt
synod (794)
Council of Aachen
Wikimedia list article
Council of Bari
synod
Eastern Orthodox – Roman Catholic theological differences
catholic–Orthodox theological differences