- Mar 9 Bulgarian Tsar Ivan Asen II defeats Theodore of Epirus near the village of Klokotnitsa
- May 2 William de Braose, 10th Baron Abergavenny is hanged by Prince Llywelyn the Great
- Jul 27 Treaty of San Germano between Emperor Frederik II & Pope Gregory IX
- Aug 31 Bishop Willebrand of Utrecht grants Swells state justice