Editing 1155 (section)

==== Europe ====
* [[Siege of Tortona]]: April 18 - German forces capture the citadel of [[Tortona]] (after a two-month [[siege]]). The city is razed to the ground, including the [[grave]]s. 
* [[June 18]] &ndash; King [[Frederick I, Holy Roman Emperor|Frederick I]] ('''Barbarossa''') is crowned as Emperor of the [[Holy Roman Empire]] by Pope [[Pope Adrian IV|Adrian IV]] at [[St. Peter's Basilica]] in [[Rome]].
* [[Arnold of Brescia]] is exiled by Adrian IV and forced to flee. He is arrested by imperial forces; [[Hanging|hanged]] and his body burned at the stake in Rome in June.
* The city of [[Bari]] rebels against King [[William I of Sicily|William I]] ('''the Bad''') of [[Kingdom of Sicily|Sicily]] and recognizes the Byzantine emperor, [[Manuel I Komnenos|Manuel I]] ('''Komnenos'''), as its overlord.<ref name=encyclopedia>{{cite book|last=Kleinhenz|first=Christopher|title=Medieval Italy: an encyclopedia|year=2010|publisher=Routledge|location=New York|isbn=978-0-415-93930-0|url=https://books.google.com/books?id=1piMMqjAf1MC&q=gran+tavola+bonsignori|page=95}}</ref>
* The [[Virgin of Vladimir]] (or '''Our Lady of Vladimir''') is taken by Grand Prince [[Andrey Bogolyubsky]] to [[Vladimir, Russia|Vladimir]] from [[Suzdal]].