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This article is about the year 1089. For the number, see 1089 (number).
|Centuries:||10th century – 11th century – 12th century|
|Decades:||1050s 1060s 1070s – 1080s – 1090s 1100s 1110s|
|Years:||1086 1087 1088 – 1089 – 1090 1091 1092|
|1089 by topic|
|Lists of leaders|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Ab urbe condita||1842|
|English Regnal year||2 Will. 2 – 3 Will. 2|
|Chinese calendar||戊辰年 (Earth Dragon)
3785 or 3725
— to —
己巳年 (Earth Snake)
3786 or 3726
|- Vikram Samvat||1145–1146|
|- Shaka Samvat||1011–1012|
|- Kali Yuga||4190–4191|
|Japanese calendar||Kanji 3
|Minguo calendar||823 before ROC
|Seleucid era||1400/1401 AG|
|Thai solar calendar||1631–1632|
|Wikimedia Commons has media related to 1089.|
- Northumbria is divided by the Normans into the counties of Northumberland, County Palatine of Durham, Yorkshire, Westmorland and Lancashire.
- George II resigns the throne of Georgia in favor of his 16-year-old son, David IV.
- August 11 – A powerful earthquake is recorded in Britain.
- June 22 – Gaston IV of Bearn and the Frankish crusaders take the Aragonese city of Monzón from the emir of Zaragoza.
- Cîteaux Abbey, the first Cistercian monastery, is founded in southern France.
- The Synod of Melfi under Pope Urban II issued decrees against simony and the clerical marriage. Supposedly, this council declared that the concubines and illegitimate wives of these clerics were subject to slavery.
- date unknown
- May 24 – Lanfranc, Archbishop of Canterbury
- May 31 – Sigwin von Are, Archbishop of Cologne
- September 29 (or 30) – Theobald III, Count of Blois
- November 11 – Saint Peter Igneus, Italian Benedictine monk