Events

• Byzantine Empire loses Battle of Manzikert to Turkish army under Alp Arslan. Control of much of Asia Minor passes to the Turks.
• The last Byzantine-controlled city in southern Italy, Bari, is captured by Robert Guiscard.
• Construction of Richmond Castle in North Yorkshire, England begins.

Births

• October 22 - William IX, Duke of Aquitaine, poet (d. 1127)