1054

1054 in variouscalendars
Gregorian calendar	1054; MLIV
Ab urbe condita	1807
Armenian calendar	503; ԹՎ ՇԳ
Assyrian calendar	5804
Balinese saka calendar	975–976
Bengali calendar	461
Berber calendar	2004
English Regnal year	N/A
Buddhist calendar	1598
Burmese calendar	416
Byzantine calendar	6562–6563
Chinese calendar	Quý tịNăm (WaterSnake); 3751 or 3544; — to —; Giáp ngọ năm (WoodHorse); 3752 or 3545
Coptic calendar	770–771
Discordian calendar	2220
Ethiopian calendar	1046–1047
Hebrew calendar	4814–4815
Hindu calendars
-Vikram Samvat	1110–1111
-Shaka Samvat	975–976
-Kali Yuga	4154–4155
Holocene calendar	11054
Igbo calendar	54–55
Iranian calendar	432–433
Islamic calendar	445–446
Japanese calendar	Tengi2; ( thiên hỉ ２ năm )
Javanese calendar	957–958
Julian calendar	1054; MLIV
Korean calendar	3387
Minguo calendar	858 beforeROC; Dân trước 858 năm
Nanakshahi calendar	−414
Seleucid era	1365/1366AG
Thai solar calendar	1596–1597
Tibetan calendar	Âm rắn nước năm; (female Water-Snake); 1180 or 799 or 27; — to —; Dương ngựa gỗ năm; (male Wood-Horse); 1181 or 800 or 28

Millennium:	2nd millennium
Centuries:	10th century; 11th century; 12th century;
Decades:	1030s; 1040s; 1050s; 1060s; 1070s;
Years:	1051; 1052; 1053; 1054; 1055; 1056; 1057;

Year1054(MLIV) was acommon year starting on Saturday(link will display the full calendar) of theJulian calendar.

Events

SultanTughrilleads a largeSeljukarmy out ofAzerbaijanintoArmenia,possibly to consolidate his frontier, while providing an incentive to hisTurkomanallies in the form of plunder. Tughril divides his army into four columns, ordering three to veer off to the north to raid into central and northern Armenia, while he takes the fourth column towardsLake Van.TheSeljuk Turkscapture and sack the fortress city ofArtchesh,after an 8-day siege.^[1]

Battle of Mortemer:TheNormans,led by DukeWilliam the Conqueror,defeat a French army (nearMortemer), as it is caught pillaging and plundering. KingHenry I of Francewithdraws his main army from theDuchy of Normandyas a result.Guy I, Count of Ponthieu,is captured during the course of the battle.

July 27–Siward,earl ofNorthumbria,invadesScotland,to support KingMalcolm IIIagainstMacbeth,who has usurped the Scottish throne from Malcolm's father,Duncan I.Macbeth is defeated atDunsinane.

TheAlmoravidsretake the trading center ofAoudaghostfrom theGhana Empire.Repeated Almoravid incursions, aimed at seizing control of the trans-Saharangold trade, disrupt Ghana's dominance of the trade routes.^[2]

Lý Nhật Tôn,third king of theLý Dynasty,begins to rule inVietnam,and changes the country's official name toĐại Việt.

July 4(approx.)–SN 1054,asupernova,is first observed by the Chinese, Arabs and possiblyNative Americans,near the starZeta Tauri.^[3]For 23 days it remains bright enough to be seen in daylight. Its remnants form theCrab Nebula(NGC1952).^[4]

Spring – PopeLeo IXsends alegatinemission, under CardinalHumbert of Silva Candida,toConstantinople,to negotiate with PatriarchMichael I Cerularius,in response to his actions concerning the church in Constantinople.^[5]Leo becomes the first pope directly to invoke the forgedDonation of Constantine,citing a large portion in a letter to Michael, believing it genuine.^[6]^[7]^[8]
July 16–East-West Schism:Humbert of Silva Candida, representative of the newly deceased Leo IX, breaks the relations betweenWesternandEastern Churches,through the act of placing an invalidly-issuedPapal Bullof excommunication during the celebration of theDivine Liturgy.

^Brian Todd Carey (2012).Road to Manzikert: Byzantine and Islamic Warfare (527–1071),p. 125.ISBN 978-1-84884-215-1.
^Levtzion, Nehemia;Hopkins, John F.P., eds. (2000), Corpus of Early Arabic Sources for West Africa, New York: Marcus Weiner Press.ISBN 1-55876-241-8.First published in 1981.
^"Journal of Astronomy", part 9, chapter 56 ofHistory of Song,first printing 1340; facsimile on frontispiece of Misner, Thorne, WheelerGravitation,1973.
^"Crab Nebula".NASA. July 12, 2016.
^Whalen, Brett Whalen (2009).Dominion of God: Christendom and Apocalypse in the Middle Ages,p. 24 (Harvard University Press).
^"Donation of Constantine".Catholic Encyclopedia.New York: Robert Appleton Company. 1913.
^Migne, Jacques-Paul (1891).Patrologia Latina.Volume 143 (cxliii). Col. 744–769.
^Mansi, Giovanni Domenico.Sacrorum Conciliorum Nova Amplissima Collectio.Volume 19 (xix). Col. 635–656.

Gregorian calendar	1054 MLIV
Ab urbe condita	1807
Armenian calendar	503 ԹՎ ՇԳ
Assyrian calendar	5804
Balinese saka calendar	975–976
Bengali calendar	461
Berber calendar	2004
English Regnal year	N/A
Buddhist calendar	1598
Burmese calendar	416
Byzantine calendar	6562–6563
Chinese calendar	Quý tịNăm (WaterSnake) 3751 or 3544 — to — Giáp ngọ năm (WoodHorse) 3752 or 3545
Coptic calendar	770–771
Discordian calendar	2220
Ethiopian calendar	1046–1047
Hebrew calendar	4814–4815
Hindu calendars
-Vikram Samvat	1110–1111
-Shaka Samvat	975–976
-Kali Yuga	4154–4155
Holocene calendar	11054
Igbo calendar	54–55
Iranian calendar	432–433
Islamic calendar	445–446
Japanese calendar	Tengi2 ( thiên hỉ ２ năm )
Javanese calendar	957–958
Julian calendar	1054 MLIV
Korean calendar	3387
Minguo calendar	858 beforeROC Dân trước 858 năm
Nanakshahi calendar	−414
Seleucid era	1365/1366AG
Thai solar calendar	1596–1597
Tibetan calendar	Âm rắn nước năm (female Water-Snake) 1180 or 799 or 27 — to — Dương ngựa gỗ năm (male Wood-Horse) 1181 or 800 or 28