1260


 * For the computer virus, see .



War and politics

 * - The, supported by the forces of King , defeats the   at.
 * King captures  from King  in the.
 * The  and  defeat the  in the.
 * The is divided into  and, marking the end of the first Saxon state.
 * War breaks out in the (today in ) as the  defends against an invasion by the.

Culture

 * - The spectacular is dedicated in the presence of King ; the cathedral is now a.
 * Construction on the begins in,.
 * Construction begins on the at.
 * Construction begins on the cathedral at.
 * compiles his work, the , a late best-seller.
 * sculpts the pulpit of the.
 * publishes Ars Cantus Mensurabilis, in which he advances a new theory of musical notation in which the length of a musical note is denoted by the shape of that note, a system still used today.
 * The Christ between the Virgin and St Minias is made on the facade of 's.
 * The advent of the Age of the Holy Spirit predicted by according to his interpretation of Revelations Ch 6.

Asia

 * - becomes ruler of the.
 * - Kublai sends his envoy Hao Jing to negotiate with the Song Dynasty Chancellor Jia Sidao, after the small force left by Kublai south of the  is destroyed by a  army of the . Chancellor Jia Sidao ordered to imprison the entire embassy of Kublai. This slight would not be forgotten by Kublai, but he was unable to assault the Song due to the civil war with his rival brother.
 * - The defeat the  at the  in, marking their first decisive defeat and the point of maximum expansion of the Mongol Empire.
 * The of  falls.
 * The Jingding begins and ends in the Southern  of.
 * The Japanese era ends, and the  era begins.
 * The, which ruled an area around , ends.
 * The newly formed of  adopts.

Africa

 * -, sultan of , is  by , who seizes power for himself.

Births

 * (died )
 * , ruler of the  and the  regions in present-day  (died )
 * , German theologian, philosopher and mystic (died )
 * , only daughter of Louis VII of France by his third wife Adèle of Champagne (died )
 * , (died )
 * , minister to King
 * , to King Philip IV of France (year very uncertain) (died )
 * , Byzantine grammarian and theologian (approximate date; died )
 * , Persian mathematician and physicist (died )

Deaths

 * -, sultan of
 * , Italian jurist (approximate date)
 * , sovereign