1266

Europe

 * - In the, an army led by , Count of , defeats a combined and  force led by King .  Manfred is killed in the battle and  invests Charles as king of  and.
 * July - Mary de Ferrers ordered to surrender land and to, second son of.
 * October - In, the winds down as supporters of the slain rebel leader  make an offer of peace to the king in the ; after slight modifications to the peace settlement, it is agreed to the following year.
 * The war between and  ends as King  and King  agree to the, which cedes the  and  to Scotland in exchange for a large monetary payment.
 * In, the  and   coins are minted for the first time.

Asia

 * , brother and uncle of reach 's capital  (now ) in, setting the stage for Marco's famous expedition starting five years later.  Kublai Khan sends the Polos back with a message requesting the  dispatch western scholars to teach in the ; however, this request is largely ignored.
 * The sultan  expands his domain, capturing the city of  (in present-day ) and the important castle of  from s, and defeating the ns at.

Births

 * (died )
 * , 's beloved and guide through Heaven in (died )

Deaths

 * - King
 * -, Swedish regent and founder of Stockholm (born about )
 * , khan of the Golden Horde
 * , Justiciar of England
 * , regent of the Mongol Empire
 * , (born )
 * , jurist of the Kingdom of Jerusalem (born )
 * Duke
 * , grand master of the Priory of Sion