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Medieval Sourcebook: Full Text Sources - http://www.fordham.edu/halsall/sbook2.html#conc2
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Nicaea, First Council of - http://www.newadvent.org/cathen/11044a.htm
First Ecumenical Council of the Catholic Church, held in 325 on the occasion of the heresy of Arius. It defined the Nicene Creed. |
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Chalcedon, Council of - http://www.newadvent.org/cathen/03555a.htm
The Fourth Ecumenical Council, held in 451, from 8 October until 1 November inclusive, at Chalcedon, a city of Bithynia in Asia Minor. |
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Nicaea, Second Council of - http://www.newadvent.org/cathen/11045a.htm
A council that was called to deal with the heresy of Iconoclasm. |
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Constantinople, First Ecumenical Council of - http://www.newadvent.org/cathen/04308a.htm
Called in May, 381, by Emperor Theodosius, to provide for a Catholic succession in the patriarchal See of Constantinople, to confirm the Nicene Faith, to reconcile the semi-Arians with the Church, and to put an end to the Macedonian heresy. |