Editing 1558 (section)

=== January&ndash;March ===
* [[January 7]] &ndash; [[Kingdom of France|French]] troops, led by [[Francis, Duke of Guise]], take [[Calais]], the last continental possession of the [[Kingdom of England]], in the [[Siege of Calais (1558)|Siege of Calais]].
* [[January 22]] &ndash; The [[Livonian War]] begins.
* [[February 2]] &ndash; The [[University of Jena]] is founded in [[Thuringia]], [[Holy Roman Empire|Germany]].<ref>{{Cite wikisource|title=Jena|date=1911|plaintitle=[[Encyclopedia Britannica]]|wslink=1911 Encyclopædia Britannica/Jena|chapter=Jena|edition=11th|publisher=Cambridge University Press|editor-last=Chisholm|editor-first=Hugh}}</ref>
* [[February 4]] &ndash; (16th day of 1st month of [[Eiroku]] 1) [[Takeda Shingen]] becomes the [[shugo]] (military governor) of [[Shinano Province]] after his successful military campaign there. 
* [[February 5]] &ndash; [[Arauco War]]: [[Pedro de Avendaño]], with sixty men, captures [[Caupolicán]] (the [[Mapuche]] Gran [[Toqui]]), who is leading their first revolt against the [[Spanish Empire]] (near [[Antihuala]]), encamped with a small band of followers.
* [[March 8]] &ndash; The city of [[Pori]] ({{langx|sv|Björneborg}}) is founded by [[Duke John (Sweden)|Duke John]] on the shores of the [[Gulf of Bothnia]].<ref>{{cite book | author = J. W. Ruuth| title = Porin kaupungin historia II| year = 1958| chapter = Kaupungin perustamiskirje | page = 269| publisher = City of Pori | language = fi}}</ref>