 |
| English | Russian |
| Fourth Book of Esdras | Апокалипсис Ездры |
| Fourth Book of Esdras | Третья книга Ездры |
| Fourth Book of Moses, Called Numbers | Четвёртая книга Моисеева. Числа |
| Fourth Crusade | Четвёртый крестовый поход (1202-1204, it turned out to be unmitigated disaster to the cause of either Christianity or the Crusade. The rift between the Eastern and Western churches widened, and the Byzantine Empire, for centuries a bulwark against invasion from the East, was damaged beyond repair) |