867
ID: 3940
Adrian II becomes hundred-sixth pope - supports Cyril and Methodius's Slavic mission
ID: 3940
867
ID: 4771
Basil I founds Macedonian dynasty - begins Byzantine golden age, murders predecessor
ID: 4771
867
ID: 5041
Photius adds filioque controversy - accuses West of heresy for saying Spirit proceeds from Father 'and Son'
ID: 5041
867
ID: 3704
March 21, 867
Blood Eagle execution of King Aella - Northumbrian king killed by sons of Ragnar in ritual revenge execution
ID: 3704