Events

• June 1 - Treaty of Rheinfelden - Duke Rudolph II of Austria has to waive his right to the Duchies of Austria and Styria
• Teutonic Knights subjugate Prussia
• Sopot comes under the control of Gdańsk
• Gregory Cyprius becomes Patriarch of Constantinople
• Northern section of the Grand Canal of China is completed
• Thai alphabet created by King Ramkhamhaeng the Great
• Edward I of England raids the Templars treasury
• Edward I of England captures Dolwyddelan Castle
• Construction of Harlech Castle begun
• Anklam becomes a member of the Hanseatic League
• Philip, heir to the throne of France, marries Jeanne of Navarre, resulting in the union of the crowns of France and Navarre

Births

• Margaret I of Scotland, Queen of Scotland (d. 1290)
• Yoshida Kenko, Japanese author

Deaths

• January 9 - Wen Tianxiang, Chinese patriot of the Song Dynasty (executed) (b. 1236)
• Saadi, Persian poet
• Rhys ap Maredudd , ruler of Deheubarth in Wales
• October 3 - David ap Gruffydd, prince of Gwynedd in Wales, executed