Feb 26 Battle of Benevento fought in Southern Italy between Manfred of Sicily and army of Charles of Anjou
Jun 22 Pope Clement IV commissions English philosopher Roger Bacon to begin "writings and remedies for current conditions" ie. write a summary of the sciences (results in his 1267 "opus major")
Jun 25 Siege of Kenilworth Castle begins by forces of King Henry III - at 172 day one of the longest sieges in English medieval history [1]
Jul 2 Treaty of Perth: Norway recognises Scottish sovereignty over the Hebrides and the Isle of Man
Dec 13 Rebels holed up inside Kenilworth Castle surrender after 172 days to Henry III, ending one of the longest sieges in medieval English history [1]
Kublai Khan