Roman Catholic and Orthodox churches: Councils and Treaties
- Basel, Council of
- Chalcedon, Council of
- concordat
- Concordat of 1801
- Constance, Council of
- Constantinople, First Council of
- Constantinople, Fourth Council of
- Constantinople, Second Council of
- Constantinople, Third Council of
- council, ecumenical
- ecumenical council
- Ephesus, Council of
- Ferrara-Florence, Council of
- Florence, Council of
- Lateran Council, Fifth
- Lateran Council, First
- Lateran Council, Fourth
- Lateran Council, Second
- Lateran Council, Third
- Lateran Treaty
- Latrocinium
- Lyons, First Council of
- Lyons, Second Council of
- Nicaea, First Council of
- Nicaea, Second Council of
- Pisa, Council of
- Poissy, Colloquy of
- Roman Question
- Trent, Council of
- Trullan synod
- Vatican Council, First
- Vatican Council, Second
- Vienne, Council of
- Whitby, Synod of
- Worms, Concordat of
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