Editing 1173 (section)

== Events ==
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=== By place ===

==== Europe ====
* [[January 5]] &ndash; [[Bolesław IV the Curly|Bolesław IV]] ('''the Curly'''), High Duke of [[Kingdom of Poland (1025–1385)|Poland]], dies after a 27-year reign. He is succeeded by his half-brother [[Mieszko III the Old|Mieszko III]] ('''the Old'''), and as duke of [[Sandomierz]] in [[Lesser Poland]] by [[Casimir II the Just|Casimir II]] ('''the Just''').
* King [[Canute I of Sweden|Canute I]] ('''Knut Eriksson''') extends his rule after the death of co-ruler [[Kol of Sweden|Kol]] – which includes also [[Östergötland]]. He becomes the unopposed sole-ruler of [[Sweden]]. Canute is supported by Earl [[Birger Brosa]].
* [[Abu Yaqub Yusuf]], caliph of the [[Almohad Caliphate]], re-populates the western Andalusian city of [[Beja (Portugal)|Beja]]. But it is rapidly abandoned, a sign of the quick demographic weakening of the Muslims in the peninsula.<ref>{{cite book|last=Picard|first=Christophe|title=Le Portugal musulman (VIIIe-XIIIe siècle): L'Occident d'al-Andalus sous domination islamique|year=2000|publisher=Maisonneuve & Larose|location=Paris|isbn=2-7068-1398-9|page=110}}</ref>

==== England ====
* Spring &ndash; [[Henry the Young King]] withdraws to the French court, marking the beginning of the [[Revolt of 1173–74]], in which former Queen [[Eleanor of Aquitaine]] and her sons rebel against her ex-husband King [[Henry II of England|Henry II]].
* [[October 17]] &ndash; [[Battle of Fornham]]: Rebel forces are defeated while fording the [[River Lark]]. Flemish mercenaries are driven into the nearby swamps by the English royalists under Lord [[Richard de Luci]] (or '''Lucy''').<ref>Beeler, John (1971). ''Warfare in Feudal Europe, 730–1200'', pp 104–105. Ithaca, NY: Cornell University Press. {{ISBN|0-8014-9120-7}}.</ref>

==== Egypt ====
* Summer &ndash; [[Saladin]] leads an expeditionary army against the [[Bedouin]] tribes in [[Oultrejordain]] to secure a route between [[Egypt in the Middle Ages|Egypt]] and [[Syria]]. He raids the region at [[Kerak Castle]].<ref>David Nicolle (2011). Osprey: Command 12 - Saladin, p. 4. {{ISBN|978-1-84908-317-1}}.</ref>
* Pro-[[Fatimid Caliphate|Fatimid]] rising in [[Upper Egypt]] led by [[Banu Kanz|Kanz al-Dawla]], governor of [[Aswan]], is crushed by Saladin's brother [[Al-Adil I|Al-Adil]].

==== China ====
* The Qiandao era ends and the Chunxi era begins during the reign of Emperor [[Emperor Xiaozong of Song|Xiao Zong]] of the [[Song dynasty]].
'''South India'''

* [[Sinhalese monarchy|Sinhalese king]] [[Parakramabahu I|Parakramabahu the Great]] gains a decisive victory by invading the [[Chola dynasty|Chola Empire]] as an ally of the [[Pandyan Civil War (1169–1177)|Pandyas]], capturing [[Tondiarpet|Tondi]] and Pasi regions.

=== By topic ===

==== Art and Leisure ====
* [[August 8]] &ndash; The construction of a [[Bell tower|campanile]], which will become the [[Leaning Tower of Pisa]], begins.
* [[Algebraic chess notation]] is first recorded.

==== Agriculture ====
* King [[Béla III of Hungary|Béla III]] invites [[Cistercians|Cistercian]] and [[Premonstratensians|Premonstratensian]] monks to [[Kingdom of Hungary (1000–1301)|Hungary]]. They introduce advanced [[Agriculture|agricultural]] methods in the realm (approximate date).

==== Religion ====
* [[February 21]] &ndash; [[Thomas Becket]] is canonized by Pope [[Pope Alexander III|Alexander III]]. His tomb in [[Canterbury Cathedral]] becomes a shrine and a popular [[pilgrimage]] destination.<ref name=CBH>{{cite book|last=Palmer|first=Alan|last2=Palmer |first2=Veronica|year=1992|title=The Chronology of British History|publisher=Century Ltd|location=London|pages=69–72|isbn=0-7126-5616-2}}</ref>
* [[Peter Waldo]], French spiritual leader, is converted to [[Christianity]] and founds the [[Waldensians]].
* The [[Great Mosque of al-Nuri (Mosul)|Great Mosque of al-Nuri]] in [[Mosul]] is completed (approximate date). 
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* [[Pedro Gudestéiz]] resigns the [[archdiocese of Santiago de Compostela]] after some controversy.<ref>[[Richard A. Fletcher]], ''The Episcopate in the Kingdom of León in the Twelfth Century'' (Oxford University Press, 1978), p. 59.</ref>