1270

The Eighth Crusade

 * Before August - King launches the  in an attempt to recapture the  from the  sultan ; the opening engagement is a siege of.
 * - King Louis IX of France dies while besieging the city of Tunis, possibly due to poor quality drinking water.
 * - The siege of Tunis and the Eighth Crusade end by an agreement between (Louis IX's brother) and the  of Tunis.

Other events in Africa

 * overthrows the n, claims the throne and establishes the.

Asia

 * In, the begins against the , a  of the.
 * The ancient city of is captured from the  and utterly destroyed by the  sultan, who goes so far as to fill in its important , leaving the site desolate and the city never to be rebuilt.
 * The city of, in present-day , is made capital of the  empire (approximate date).
 * The independent state of is founded in present-day.
 * A census of the Chinese city of establishes that some 186,330 families reside within it, not including visitors and soldiers.  (Historian Jacques Gernet argues that this means a population of over 1 million inhabitants, making Hangzhou the most populous city in the world.)

Europe

 * - Crucial aspects of the of  (itself based on 's works) are banned by the  in a  enacted by  authority at the.
 * The , a work by that is considered within the  to be the paramount expression of its, is completed (year uncertain).
 * translates 's 200-year-old treatise on, , from into , bringing the work to an academic circles for the first time.
 * The fables known as the, dating from as early as 200 , are translated into  from a  version by.
 * Construction of the in  is completed.
 * The on the  in  is completed.

Births

 * -, son of (died )
 * , Spanish rabbi and religious writer
 * , Byzantine statesman and author
 * , Franciscan theologian (died )
 * , Italian scholar (died )
 * (died )
 * , Italian poet (died )
 * , Chinese poet
 * , Marathi saint and poet (died )
 * , Scottish patriot (died )

Deaths

 * -, daughter of (born )
 * - (born )
 * King
 * -, King of Navarre
 * , second mansa of the Mali Empire
 * (born )
 * , King of Georgia (born )
 * , Jewish rabbi and scholar (born )
 * -, King of Navarre
 * , second mansa of the Mali Empire
 * (born )
 * , King of Georgia (born )
 * , Jewish rabbi and scholar (born )