| Timeline |
| 2600s •2610s • 2620s • 2630s |
| • 2643 2640s part of the 27th century • 2648 • 2649
|
| 2650s • 2660s • 2670s • 2680s |
In the 2640s, the Catholic Church fought the Beatrician Crusade against the Mal'akh. As with the previous couple decades of the 27th century, hundreds left the Church to join the Remote. (PROSE: De Umbris Idearum)