Editing 989 (section)

=== By topic ===

==== Religion ====
* [[Charroux Abbey|Council of Charroux]]: French bishops under the [[patronage]] of [[William IV, Duke of Aquitaine|William IV]], duke of [[Duchy of Aquitaine|Aquitaine]], declare the first [[Peace and Truce of God#Peace of God|Peace of God]] (or '''Pax Dei'''). This agreement grants immunity from violence to noncombatants (peasants and [[clergy]]) who can not defend themselves.

==== Art ====
* [[October 25]] &ndash; The [[Hagia Sophia]] at Constantinople is struck by a great [[earthquake]], causing the collapse of the western [[dome]] arch. Basil II asks the [[Armenians|Armenian]] architect [[Trdat the Architect|Trdat]], the creator of the [[Cathedral of Ani]], to direct the repairs.<ref>{{cite journal|author-link=Christina Maranci|last=Maranci|first=Christina|jstor=3592516|title=The Architect Trdat: Building Practices and Cross-Cultural Exchange in Byzantium and Armenia|journal=[[Journal of the Society of Architectural Historians]]|volume=62|issue=3|date=September 2003|pages=294–305|doi=10.2307/3592516|doi-access=free}}</ref>

==== Education ====
* [[Sankore Madrasah]], at this stage a mosque, is founded in Timbuktu (modern-day [[Mali]]).

==== Astronomy ====
* September &ndash; [[Halley's Comet]] is at [[Perihelion and aphelion|perihelion]].
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