840s explained

The 840s decade ran from January 1, 840, to December 31, 849.

Significant people

• Al-Mu'tasim
• Al-Wathiq
• Alfred the Great
• Louis the Pious
• Charles the Bald
• Ermentrude of Orléans
• Louis the Stammerer
• Louis the German
• Lothair I
• Kenneth I of Scotland
• Ragnar Lodbrok
• Michael III

References

Bibliography

• • • • • Book: Kennedy, Hugh . Hugh N. Kennedy . [{{Google Books|67fZB5YGkOQC|plainurl=y}} When Baghdad Ruled the Muslim World: The Rise and Fall of Islam's Greatest Dynasty ]. Cambridge, MA . Da Capo Press . 2006 . 978-0-306814808 .
  • Book: Toynbee, Arnold . Arnold J. Toynbee . Constantine Porphyrogenitus and His World . 1973 . London and New York . Oxford University Press . 0-19-215253-X.
• Book: Goldberg, Eric J.. Struggle for Empire: Kingship and Conflict under Louis the German, 817-876. 2006. Ithaca, NY. Cornell University Press. 9780801438905.