Attended by about 600 bishops. Declared that Christ is one Person with two distinct natures, divine and human. This was proposed by Pope Leo I, and the response of the bishops was "This we all believe. Peter has spoken through Leo."
Attended by more than 100 bishops. Excommunicated Photius, Patriarch of Constantinople, which caused further tension between East and West.
Eastern General Councils
(325 - 870)
In the first millennium after Christ, the Church held its first eight General (Ecumenical) Councils (GCs) in the East in various places, now all part of present-day Turkey. Subsequently the General Councils convened in the West.
A summary of each of the eight GCs is given below; click on the associated hyperlink for a detailed account.