Events

• King Mindaugas of Lithuania renounces Christianity, returning to his pagan roots and reverting to Grand Duke of Lithuania.
• The Icelandic Commonwealth enters into a treaty establishing a union with Norway and acknowledges Norwegian King Haakon IV as its ruler.
• Strasbourg becomes an Imperial Free City of the Holy Roman Empire.
• 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.

Births

• July 2 - Arthur II, Duke of Brittany (died 1312)
• Ladislaus IV of Hungary (died 1290)
• Hugh le Despenser, 1st Earl of Winchester (died 1326)

Deaths

• July 15 - Richard de Clare, 6th Earl of Hertford, English soldier (born 1222)
• Aegidius of Assisi, companion of Saint Francis of Assisi
• Shinran Shonin, Japanese founder of the Jodo Shinshu branch of Pure Land Buddhism
• Matilda II of Boulogne, Queen of Portugal, spouse of King Afonso III of Portugal (born 1202)