King Henry III of England obtains a papal bull releasing him from the Provisions of Oxford, preceding the Second Barons' War, a civil war started in 1263.
King Mengrai of the Lannathai kingdom in present day Thailand founds the city of Chiang Rai as the kingdom's first capital.
Adam de la Halle writes the first operetta, "Le Jeu de la Feuillee".
Richard of Chichester is canonized as a saint; he is best known for authoring the prayer later adapted into the song Day by Day in the musical Godspell.