Editing 1278 (section)

== Deaths ==
* [[January 3]] &ndash; [[Ladislaus II Kán]], Hungarian nobleman and knight
* [[January 22]] &ndash; [[Roger Skerning|Roger de Skerning]], English monk and bishop
* [[March 16]] &ndash; [[William IV, Count of Jülich|William IV]], German nobleman and knight (b. [[1210]])
* March 28 or 29 &ndash; [[Bertrand de Saint-Martin]], French cardinal and archbishop
* [[May 1]] &ndash; [[William of Villehardouin|William II of Villehardouin]], prince of [[Principality of Achaea|Achaea]] (b. [[1211]])
* [[May 8]] &ndash; [[Emperor Duanzong]] (or Zhao Shi), Chinese emperor (b. [[1270]])
* [[June 30]] &ndash; [[Pierre de la Broce]], French nobleman and councilor
* [[August 16]] &ndash; [[Napoleone della Torre]] (or Napo), Italian nobleman
* [[August 26]] &ndash; [[Ottokar II of Bohemia|Ottokar II]], Bohemian nobleman and king (b. [[1233]])
* September or October &ndash; [[Robert de Chauncy]], English cleric, bishop and high sheriff
* [[November 13]] &ndash; [[Barnim I, Duke of Pomerania|Barnim I]], German nobleman ([[House of Griffin]])
* December 26/31 &ndash; [[Bolesław II the Horned]], Polish nobleman ([[Piast dynasty|House of Piast]])
* December (or 1277) &ndash; [[Sambor II, Duke of Pomerania|Sambor II of Tczew]], German nobleman, prince and knight
* [[Andrew, Duke of Slavonia]], Hungarian nobleman and prince ([[Árpád dynasty|House of Árpád]]) (b. [[1268]])
* [[Geoffrey Chauderon]], Latin nobleman and Grand Constable
* [[Lancelot de Saint-Maard]], French nobleman and marshal
* [[Lanxi Daolong]], Chinese-born monk and calligrapher (b. [[1213]])
* [[Lý Chiêu Hoàng]], Vietnamese empress consort (b. [[1218]])
* [[Martin of Opava]] (or Poland), Polish bishop and chronicler
* [[Stephen II Báncsa]], Hungarian prelate and bishop (b. [[1240]])
* [[Sir Tudur ap Ednyfed Fychan|Tudur ap Ednyfed Fychan]], Welsh nobleman and politician
* [[Ubertino Pallavicini]], Italian nobleman ([[Pallavicini family|House of Pallavicini]])