en 1138

1138 in various calendars
Gregorian calendar	1138; MCXXXVIII
Ab urbe condita	1891
Armenian calendar	587; ԹՎ ՇՁԷ
Assyrian calendar	5888
Balinese saka calendar	1059–1060
Bengali calendar	544–545
Berber calendar	2088
English Regnal year	3 Ste. 1 – 4 Ste. 1
Buddhist calendar	1682
Burmese calendar	500
Byzantine calendar	6646–6647
Chinese calendar	丁巳年 (Fire Snake); 3835 or 3628; — to —; 戊午年 (Earth Horse); 3836 or 3629
Coptic calendar	854–855
Discordian calendar	2304
Ethiopian calendar	1130–1131
Hebrew calendar	4898–4899
Hindu calendars
- Vikram Samvat	1194–1195
- Shaka Samvat	1059–1060
- Kali Yuga	4238–4239
Holocene calendar	11138
Igbo calendar	138–139
Iranian calendar	516–517
Islamic calendar	532–533
Japanese calendar	Hōen 4; (保延４年)
Javanese calendar	1044–1045
Julian calendar	1138; MCXXXVIII
Korean calendar	3471
Minguo calendar	774 before ROC; 民前774年
Nanakshahi calendar	−330
Seleucid era	1449/1450 AG
Thai solar calendar	1680–1681
Tibetan calendar	阴火蛇年; (female Fire-Snake); 1264 or 883 or 111; — to —; 阳土马年; (male Earth-Horse); 1265 or 884 or 112

Millennium:	2nd millennium
Centuries:	11th century; 12th century ; 13th century;
Decades:	1110s; 1120s; 1130s ; 1140s; 1150s;
Years:	1135; 1136; 1137; 1138 ; 1139; 1140; 1141;

Events

March 7 – Conrad III is elected as King of Germany, in the presence of the papal legate Theodwin at Koblenz. He is crowned at Aachen six days later (on March 13), and acknowledged in Bamberg by several German princes of southern Germany.^[1] Henry X (the Proud), son-in-law and heir of the late King Lothair III, refuses his allegiance to Conrad. He is deprived of all his Saxon territories, which are given to Leopold IV (the Generous).
Summer – A civil war breaks out in the Holy Roman Empire, a struggle begins between the Guelphs and Ghibellines, while the family name Welf of Henry X will be corrupted into Guelph.
October 20 – Bolesław III (Wrymouth) dies after a 31-year reign. He divides Poland among his sons: Władyslaw II (the Exile) receives Silesia and the Senioral territories – which includes the Kraków and Łęczyca regions, as well as parts of Kujawy and Wielkopolska ("Greater Poland"). Bolesław IV (the Curly) receives Masovia and Mieszko III receives the newly established Duchy of Greater Poland. The 7-year-old Henry becomes duke of Sandomierz. Bolesław's last son, Casimir II receives nothing, as he is born after his father's death.^[2]

May – Earl Robert FitzRoy rebels against King Stephen, supporting Matilda (his step-sister) in her claim for the English throne. Matilda is given refuge by Earl William de Albini at Arundel Castle. Stephen builds siege works around the castle, but is unable to break the castle's defences. In France, Matilda's husband Duke Geoffrey V (the Fair) takes advantage of the situation by re-invading Normandy.
August 22 – Battle of the Standard: King David I of Scotland gives his full support to Matilda (daughter of the late King Henry I), and invades the north of England – travelling as far south as Lincolnshire. The Scottish army (some 15,000 men) is defeated by English forces under Earl William le Gros in Yorkshire. David retreats to Carlisle and reassembles an army.
The Earldom of Pembroke, created for Gilbert de Clare, becomes the first earldom created by Stephen within the borders in Wales. Gilbert receives the rape and Pevensey Castle.

Spring – Emperor John II (Komnenos) leads a Byzantine expeditionary force into Syria and arrives before the walls of Aleppo on April 20. The city proves too strong to attack, but the fortresses of Biza'a, Athareb, Ma'arrat Nu'man and Kafartab are taken by assault. While the Byzantines besiege the city of Shaizar, the Crusader allies Prince Raymond of Poitiers of Antioch and Count Joscelin II of Edessa remain in their camp playing dice.^[3]
Siege of Shaizar: The Byzantines under John II besiege the capital of the Munqidhite Emirate. They capture the lower city on May 20, but fail to take the citadel. John negotiates with Emir Abu'l Asakir Sultan – who sends him an offer to pay a large indemnity and becoming a vassal of the Byzantine Empire. John, disgusted by his Crusader allies, accepts the terms and raises the siege on May 21.^[4]
October 11 – An earthquake in Aleppo, Syria, kills about 230,000 people.
Al-Rashid Billah (Deposed caliph of Baghdad) fled to Isfahan where he was assassinated by a team of four Nizari Ismailis (Assassins) in June 1138. This was celebrated in Alamut for a week by Shias.^[5]

November 5 – Lý Anh Tông is enthroned as emperor of Đại Việt at the age of two, starting a 37-year reign.

April 10 – Robert Warelwast is nominated as bishop of Exeter at a royal council in Northampton, England.

^ Daniel Quitz (May 19, 2014). Die Königswahl Konrad III. 1138 und seine Politik gegenüber den Welfen. GRIN Cerlag. pp. 1–. ISBN 978-3-656-65725-5.
^ Richard Brzezinski (1998). History of Poland – Old Poland and the Piast Dynasty, pp. 20–21. ISBN 83-7212-019-6.
^ Steven Runciman (1952). A History of The Crusades. Vol II: The Kingdom of Jerusalem, pp. 173–174. ISBN 978-0-241-29876-3.
^ Steven Runciman (1952). A History of The Crusades. Vol II: The Kingdom of Jerusalem, pp. 173–175. ISBN 978-0-241-29876-3.
^ Daftary, Farhad (1992). The Isma'ilis: Their History and Doctrines. Cambridge University Press. p. 384. ISBN 978-0-521-42974-0.
^ Lyons, Malcolm; Jackson, D. E. P. (2008). Saladin: The Politics of the Holy War. Cambridge University Press. p. 2. ISBN 978-0521317399.