991

991 in various calendars
Gregorian calendar	991; CMXCI
Ab urbe condita	1744
Armenian calendar	440; ԹՎ ՆԽ
Assyrian calendar	5741
Balinese saka calendar	912–913
Bengali calendar	398
Berber calendar	1941
Buddhist calendar	1535
Burmese calendar	353
Byzantine calendar	6499–6500
Chinese calendar	庚寅年 (Metal Tiger); 3688 or 3481; — to —; 辛卯年 (Metal Rabbit); 3689 or 3482
Coptic calendar	707–708
Discordian calendar	2157
Ethiopian calendar	983–984
Hebrew calendar	4751–4752
Hindu calendars
- Vikram Samvat	1047–1048
- Shaka Samvat	912–913
- Kali Yuga	4091–4092
Holocene calendar	10991
Iranian calendar	369–370
Islamic calendar	380–381
Japanese calendar	Shōryaku 2; (正暦２年)
Javanese calendar	892–893
Julian calendar	991; CMXCI
Korean calendar	3324
Minguo calendar	921 before ROC; 民前921年
Nanakshahi calendar	−477
Seleucid era	1302/1303 AG
Thai solar calendar	1533–1534
Tibetan calendar	阳金虎年; (male Iron-Tiger); 1117 or 736 or −36; — to —; 阴金兔年; (female Iron-Rabbit); 1118 or 737 or −35

Millennium:	1st millennium
Centuries:	9th century; 10th century ; 11th century;
Decades:	970s; 980s; 990s ; 1000s; 1010s;
Years:	988; 989; 990; 991 ; 992; 993; 994;

Year 991 (CMXCI) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.

Events

March 1: In Rouen, Pope John XV ratifies the first Truce of God, between Æthelred the Unready and Richard I of Normandy.
March 29: Bishop Adalberon imprisons the treasonous Duke Charles of Lorraine and his nephew Arnulf, the Archbishop of Reims. Adalberon delivers the two men to King Hugh Capet, who imprisons them and their family in Orléans. The cities of Reims and Laon are returned to Capet.
April 5: 991 Damascus earthquake in Syria: According to historian George Elmacin (13th century), the earthquake caused the fall of 1,000 houses in Damascus itself, and many people were trapped in their ruins and died. The village of Beglabec was reportedly engulfed, due to the earthquake.^[1]
Spring: Byzantine Emperor Basil II begins a campaign against the Bulgarians.
June 15: Theophanu dies in Nijmegen, and Adelaide of Italy assumes full regency over her grandson, Otto III.
June 17 – 18: The royal council of Saint-Basle de Verzy is marked by opposition between the bishops and the monks. Gerbert d'Aurillac is elected as the deposed Arnulf's successor as the Archbishop of Reims, to the anger of Pope John XV, who had no involvement in the decision.
August 11: Following a raid by Olaf Tryggvason at the mouth of the River Thames, ealdorman Byrhtnoth is killed in the Battle of Maldon in Essex, which is commemorated in the Old English poem The Battle of Maldon. Æthelred the Unready is forced to pay a tribute of 22,000 pounds of silver for Tryggvason to withdraw his troops; this is the first in a series of Danegelds.^[2]
November 22: The beginning of the reign of al-Qadir, Abbasid caliph of Baghdad, under the tutelage of the Buyids and following the deposition of al-Ta'i.

Unknown dates

Count Odo I of Blois, who captured Melun, is driven out of the city by the coalition of King Hugh Capet, Count Fulk III of Anjou and Richard I of Normandy; Odo is defeated in Orsay by Bouchard I of Vendôme, a faithful vassal of Capet charged with guarding Melun.
Stavoren is sacked in Viking raids on the ports of Frisia and the mouths of the Rhine.
Pietro II Orseolo becomes the 26th Doge of Venice. Venice establishes a protectorate on the coast of the Dalmatian Islands.
Taranto is sieged by Sicilian Arabs.
The Dagome iudex, a document which enumerates the possessions of Mieszko I, is written and entrusted to Pope John XV, who places the Polish territories under papal protection.
Mount Vesuvius erupts.

Births

Guido Monaco, Italian monk and music theorist (or 992)
Pons II (or Pons William), count of Toulouse (d. 1060)
Yan Shu, Chinese statesman and poet (d. 1055)

Deaths

March 1 – En'yū, emperor of Japan (b. 959)
April 2 – Bardas Skleros, Byzantine general
April 4 – Reginold, bishop of Eichstätt
May 11 – Heriward, Frankish abbot
May 20 – Piligrim, bishop of Passau
August 11 – Byrhtnoth, ealdorman of Essex
Aleramo, marquess of Montferrat and Liguria
Al-Muqaddasi, Arab Muslim geographer
Ashot-Sahak, king of Vaspurakan (Armenia)
Bakjur, Hamdanid mercenary and governor
Gausfred I, count of Empúries and Roussillon
Ibn Babawayh, Persian Shi'ite scholar
Meng Xuanzhe, prince of Later Shu (b. 937)
Nakatsukasa, Japanese waka poet (b. 912)
Ōnakatomi no Yoshinobu, Japanese nobleman (b. 921)
Pan Mei, Chinese general and statesman
Qian Weijun, king of Wuyue (Ten Kingdoms) (b. 955)
Sa'd al-Dawla, Hamdanid emir (b. 952)
Suero Gundemáriz, Spanish nobleman
Taira no Kanemori, Japanese nobleman
Ya'qub ibn Killis, Fatimid vizier (b. 930)

References

^ Antonopoulos, 1980
^ John Haywood (1995). The Historical Atlas of the Vikings: Raids on Æthelred's Kingdom, pp. 118–119. ISBN 978-0-140-51328-8.

Sources

Antonopoulos, J. (1980), Data from investigation of seismic Sea waves events in the Eastern Mediterranean from 500 to 1000 A.D., Annals of Geophysics

[Antonopoulos-1] Antonopoulos, 1980

[2] John Haywood (1995). The Historical Atlas of the Vikings: Raids on Æthelred's Kingdom, pp. 118–119. ISBN 978-0-140-51328-8.

[1]

[2]

Gregorian calendar	991 CMXCI
Ab urbe condita	1744
Armenian calendar	440 ԹՎ ՆԽ
Assyrian calendar	5741
Balinese saka calendar	912–913
Bengali calendar	398
Berber calendar	1941
Buddhist calendar	1535
Burmese calendar	353
Byzantine calendar	6499–6500
Chinese calendar	庚寅年 (Metal Tiger) 3688 or 3481 — to — 辛卯年 (Metal Rabbit) 3689 or 3482
Coptic calendar	707–708
Discordian calendar	2157
Ethiopian calendar	983–984
Hebrew calendar	4751–4752
Hindu calendars
- Vikram Samvat	1047–1048
- Shaka Samvat	912–913
- Kali Yuga	4091–4092
Holocene calendar	10991
Iranian calendar	369–370
Islamic calendar	380–381
Japanese calendar	Shōryaku 2 (正暦２年)
Javanese calendar	892–893
Julian calendar	991 CMXCI
Korean calendar	3324
Minguo calendar	921 before ROC 民前921年
Nanakshahi calendar	−477
Seleucid era	1302/1303 AG
Thai solar calendar	1533–1534
Tibetan calendar	阳金虎年 (male Iron-Tiger) 1117 or 736 or −36 — to — 阴金兔年 (female Iron-Rabbit) 1118 or 737 or −35