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| English | Russian |
| Sixth Crusade | Шестой крестовый поход (1228-1229, by diplomacy alone and without major military confrontation, Jerusalem, Bethlehem, and a corridor running to the sea were ceded to the Kingdom of Jerusalem) |
| Sixth Ecumenical Council | Шестой Вселенский собор (680, the council of the Christian church summoned by the emperor Constantine IV and meeting at Constantinople) |