Editing 940 (section)

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

==== Europe ====
* The tribe of the [[Polans (western)|Polans]] begins the construction of the following fortified settlements ([[Giecz]], [[Bnin, Kórnik|Bnin]], [[Ląd, Greater Poland Voivodeship|Ląd]], [[Gniezno]], [[Poznań]], [[Grzybowo, Września County|Grzybowo]] and [[Ostrów Lednicki]]) in [[Greater Poland]]. The [[Piast dynasty|Piast Dynasty]] under Duke [[Siemomysł]] gains control over other groups of Polans along the Upper [[Vistula]], and establishes their rule around Giecz (approximate date).

==== Japan ====
* [[March 25]] &ndash; [[Taira no Masakado]], the self-proclaimed "New Emperor" (新皇), is subdued by local rivals who revolt against his rule. His forces are defeated by his cousin, [[Taira no Sadamori]], in [[Shimōsa Province]]. Masakado's head is brought back to Emperor [[Emperor Suzaku|Suzaku]] in [[Tokyo]].<ref name=Turnbull2>{{cite book |last=Turnbull |first=Stephen |title=The Samurai Sourcebook |publisher=Cassell & Co. |year=1998 |isbn=1854095234 |page=199}}</ref>

=== By topic ===
==== Literature ====
* [[Saadia Gaon]], a Jewish [[rabbi]] and philosopher, compiles his [[Siddur of Saadia Gaon|Siddur]] (Jewish prayer book) in [[Arabic]] and [[Synagogue|synagogal]] poetry in modern-day [[Iraq]] (approximate date).

==== Religion ====
*[[Narita-san]] ("New victory temple"), a [[Shingon Buddhism|Shingon Buddhist]] temple, is founded in [[Chiba Prefecture|Chiba]] ([[Japan]]).
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