1267

- King Afonso III of Portugal and King Alfonso X of Castile sign a treaty determining the southern border between Portugal and Spain as the Guadiana River, a border that remains to this day.

- The Second Barons' War in England ends, as the rebels and King Henry III of England agree to peace terms as laid out in the Dictum of Kenilworth.

- King Henry III of England acknowledges Llywelyn ap Gruffudd's title of Prince of Wales in the Treaty of Montgomery.

- Emperor Baldwin II of Constantinople gifts the Principality of Achaea to King Charles I of Sicily in the Treaty of Viterbo in the hopes that Charles could help him restore the Latin Empire.

- The city of Ostrava was founded.