Roman Catholic and Orthodox churches: Councils and Treaties
- Colloquy of Poissy
- Concordat of 1801
- Concordat of Worms
- Council of Basel
- Council of Chalcedon
- Council of Constance
- Council of Ferrara-Florence
- Council of Trent
- ecumenical council
- Fifth Lateran Council
- First Council of Nicaea
- First Lateran Council
- First Vatican Council
- School principals
- Second Council of Nicaea
- Second Vatican Council
- Synod of Whitby