Editing 1166 (section)

==== Europe ====
* [[May 7]] &ndash; King [[William I of Sicily|William I]] ("the Wicked") of [[Sicily]] dies at [[Palermo]] after a 12-year reign. He is succeeded by his 12-year-old son [[William II of Sicily|William II]] ("the Good"), whose mother, [[Margaret of Navarre]], will be [[regent]] until he comes of age.
* [[July 5]] &ndash; The town of [[Bad Kleinkirchheim]] (in modern [[Austria]]) is first mentioned, in an ecclesiastical document, in which Archbishop [[Conrad of Babenberg|Conrad II]] of [[prince-Archbishopric of Salzburg|Salzburg]] confirms the donation of a chapel, nearby [[Millstatt Abbey]].
* Autumn &ndash; Holy Roman Emperor [[Frederick Barbarossa]] begins his fourth Italian campaign, hoping to secure the claim of [[Antipope Paschal III]] in [[Rome]] and the coronation of his wife [[Beatrice I, Countess of Burgundy]], as Holy Roman Empress.
* [[Mieszko III the Old]] proclaims a [[Prussian crusade]] against the pagans and pressures the collaboration of Frederick I. He leaves [[Greater Poland]] in the hands of his younger brother [[Casimir II the Just]].
* [[Henry the Lion]], duke of [[Duchy of Saxony|Saxony]], has the [[Brunswick Lion]] created at [[Dankwarderode Castle]] in [[Braunschweig]] (modern [[Germany]]). (Mentioned by [[Albert of Stade]], a German abbot and chronicler, as the year of origin.)