Editing 11th century (section)

===[[1080s]]===
[[Image:Domesday Book - Warwickshire.png|thumb|upright|A page of the [[Domesday Book]] of England]]
* 1080–1081: The Chinese statesman and scientist [[Shen Kuo]] is put in command of the campaign against the [[Western Xia]], and although he successfully halts their invasion route to Yanzhou (modern [[Yan'an]]), another officer disobeys imperial orders and the campaign is ultimately a failure because of it.
* 1081: birth of [[Urraca of León and Castile]] future Queen of [[Kingdom of Castile|Castille]] and [[Kingdom of León|León]].
* 1084: the enormous Chinese historical work of the ''[[Zizhi Tongjian]]'' is compiled by scholars under Chancellor [[Sima Guang]], completed in 294 volumes and included 3 million written [[Chinese characters]]
* 1085: [[Alfonso VI of Castile]] captures the [[Moors|Moorish]] Muslim city of [[Toledo, Spain|Toledo]], Spain.
* 1085: the [[Katedralskolan, Lund]] school of Sweden is established by [[Canute IV of Denmark]]
* 1086: compilation of the [[Domesday Book]] by order of [[William I of England]]; it was similar to a modern-day government [[census]], as it was used by William to thoroughly document all the landholdings within the kingdom that could be properly [[tax]]ed.
* 1086: the [[Battle of az-Zallaqah]] between the Almoravids and Castilians
* 1087: a new office at the Chinese international [[seaport]] of [[Quanzhou]] is established to handle and regulate taxes and tariffs on all mercantile transactions of foreign goods coming from Africa, Arabia, India, Sri Lanka, Persia, and South East Asia.
* 1087: the Italian cities of [[Genoa]] and [[Pisa]] engage in the African [[Mahdia campaign of 1087|Mahdia campaign]]
* 1087: [[William II of England]], son of William the Conqueror, is crowned king of England.
* 1088: the renowned [[polymath]] Chinese scientist and official [[Shen Kuo]] made the world's first reference to the [[magnetic]] [[compass]] in his book ''[[Dream Pool Essays]]'',<ref>Bowman, 599.</ref><ref>Mohn, 1.</ref> along with encyclopedic documentation and inquiry into scientific discoveries.
* 1088: The [[University of Bologna]] is established.
* 1088: [[Rebellion of 1088]] against [[William II of England]] led by [[Odo of Bayeux]].