1091

This article is about the year 1091. For the number, see 1091 (number).

Millennium:	2nd millennium
Centuries:	10th century – 11th century – 12th century
Decades:	1060s  1070s  1080s  – 1090s –  1100s  1110s  1120s
Years:	1088 1089 1090 – 1091 – 1092 1093 1094

1091 by topic

Lists of leaders

State leaders

Birth and death categories

Births – Deaths

Establishments and disestablishments categories

Establishments – Disestablishments

1091 in other calendars

Gregorian calendar	1091 MXCI
Ab urbe condita	1844
Armenian calendar	540 ԹՎ ՇԽ
Assyrian calendar	5841
Bengali calendar	498
Berber calendar	2041
English Regnal year	4 Will. 2 – 5 Will. 2
Buddhist calendar	1635
Burmese calendar	453
Byzantine calendar	6599–6600
Chinese calendar	庚午年 (Metal Horse) 3787 or 3727     — to — 辛未年 (Metal Goat) 3788 or 3728
Coptic calendar	807–808
Discordian calendar	2257
Ethiopian calendar	1083–1084
Hebrew calendar	4851–4852
Hindu calendars
- Vikram Samvat	1147–1148
- Shaka Samvat	1013–1014
- Kali Yuga	4192–4193
Holocene calendar	11091
Igbo calendar	91–92
Iranian calendar	469–470
Islamic calendar	483–484
Japanese calendar	Kanji 5 (寛治５年)
Julian calendar	1091 MXCI
Korean calendar	3424
Minguo calendar	821 before ROC 民前821年
Seleucid era	1402/1403 AG
Thai solar calendar	1633–1634

Year 1091 (MXCI) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar.

Events

By area

Europe

• King William II of England invades Normandy and gains a foothold in it.
• Ladislaus I of Hungary occupies Slavonia.
• King Stjepan II of Croatia, the last member of the Trpimirović dynasty, died peacefully without leaving an heir.

British Isles

• October 17 – London Tornado of 1091: A T8/F4 tornado is recorded in St Mary-le-Bow of London, England; the storm destroys London Bridge.
• Henry, the third son of William the Conqueror, is forced to surrender his property of Cotentin in Normandy after his two older brothers, William Rufus and Robert Curthose, make a peace agreement.
• King Malcolm III of Scotland makes an unsuccessful attempt to invade English territory, but is finally forced to pay homage to King William II of England.
• Cardiff Castle is built.

Mediterranean

• April 29 – Battle of Levounion: The Pechenegs besiege Constantinople, but are defeated so decisively by Emperor Alexius I that they fade into oblivion.
• February; With the taking of Noto, the Normans complete the 30-year-long conquest of Sicily from the Islamic rulers.
• The Islamic Abbadid dynasty ruling in Spain falls when the Almoravids storm Seville. Confronted with this new threat, the king of Badajoz, al-Mutawakkil ibn al-Aftas, obtains the support of Castile in exchange for the Muslim positions on the Tagus river — Sintra, Santarém and Lisbon.
• Roger Guiscard takes Malta.

By topic

Religion

• Athanasius VI bar Khamoro becomes Syriac Orthodox Patriarch of Antioch.

Births

• date unknown –

Deaths

• June 17 – Dirk V, Count of Holland
• July 5 – Abbot William of Hirsau
• August 25 – Sisnando Davides, military leader
• December 19 – Adelaide of Susa, margravine of Turin
• date unknown –

Robert D'Oyly, first Lord of Oxford Castle