Year 1108 (MCVIII) was a leap year starting on Wednesday (link will display the full calendar) of the Julian calendar.
|Ab urbe condita||1861|
|Balinese saka calendar||1029–1030|
|English Regnal year||8 Hen. 1 – 9 Hen. 1|
|Chinese calendar||丁亥年 (Fire Pig)|
3804 or 3744
— to —
戊子年 (Earth Rat)
3805 or 3745
|- Vikram Samvat||1164–1165|
|- Shaka Samvat||1029–1030|
|- Kali Yuga||4208–4209|
|Japanese calendar||Kajō 3 / Tennin 1|
|Minguo calendar||804 before ROC|
|Seleucid era||1419/1420 AG|
|Thai solar calendar||1650–1651|
1234 or 853 or 81
— to —
1235 or 854 or 82
- Spring – King Sigurd I (the Crusader) sails from England, on the Norwegian Crusade to Palestine. He repels a Muslim fleet near the Tagus River, then attacks Sintra, Lisbon and Alcácer do Sal, and finally defeats a second Muslim fleet further south.
- May 29 – Battle of Uclés: Almoravid forces defeat the armies of Castile and León. The advance of the Reconquista is halted, and the Berbers re-capture the towns of Uclés, Cuenca, Huete and Ocaña. The Christians, many of nobility, are beheaded.
- July 29 – King Philip I (the Amorous) dies at Melun, after a 48-year reign. He is succeeded by his son Louis VI (the Fat), who, at the start of his rule, faces insurrections from feudal brigands and rebellious robber barons.
- September – Siege of Dyrrhachium: Italo-Norman forces under Bohemond I lift the siege due to illness and lack of supplies. Bohemond becomes a vassal of the Byzantine Empire by signing the Treaty of Devol.
- Autumn – The Principality of Nitra ceases to exist, after King Coloman (the Learned) of Hungary, deposes its last ruler, Álmos, duke of Croatia.
- The consuls of Bergamo are first mentioned, indicating that the city has become an independent commune in Lombardy (Northern Italy).
- Summer – Jawali Saqawa, Turkish ruler (atabeg) of Mosul, accepts a ransom of 30,000 dinar by Count Joscelin I and releases his cousin Baldwin II, count of Edessa, who is held as prisoner (see 1104).
- Baldwin I marches out against Sidon, with the support of a squadron of sailor-adventurers from various Italian cities. A Fatimid fleet from Egypt defeats the Italians in a sea-battle outside the harbour.
- The Taira and Minamoto clans join forces to rule Japan, after defeating the warrior monks of the Enryaku-ji temple near Kyoto. The Taira replace many Fujiwara nobles in important offices – while the Minamoto gain more military experience by bringing parts of Northern Honshu under Japanese control (approximate date).
- Chichester Cathedral is consecrated under Ralph de Luffa, bishop of Chichester, in England.
- Construction begins on the tower of Winchester Cathedral, building continues until 1120.
- Pistoia Cathedral in Italy is damaged by a severe fire.
- June 13 – Restored Ferentino Cathedral in Italy is consecrated.
- Andronikos Komnenos, Byzantine prince (d. 1142)
- Baldwin IV (the Builder), count of Hainaut (d. 1171)
- Bohemond II, Italo-Norman prince of Antioch (d. 1130)
- Derbforgaill (or Derval), Irish princess (d. 1193)
- Ghiyath ad-Din Mas'ud, Seljuk sultan (d. 1152)
- Henry X (the Proud), duke of Bavaria (d. 1139)
- Leopold IV (the Generous), duke of Bavaria (d. 1141)
- January 4 – Gertrude, Grand Princess of Kiev
- March 18 – Abe no Munetō, Japanese samurai (b. 1032)
- May 21 – Gerard, Norman archbishop of York
- May 29
- García Ordóñez, Castilian nobleman
- Sancho Alfónsez, Castilian nobleman
- July 5 – Guy of Hauteville, Italo-Norman diplomat
- July 29 – Philip I (the Amorous), king of France
- November 15 – Enrico Contarini, bishop of Castello
- García Álvarez, Castilian official and military leader
- Gonzalo, bishop of Mondoñedo (approximate date)
- Gregory III, count of Tusculum (approximate date)
- Gundulf, bishop of Rochester (approximate date)
- Guy II (the Red), French nobleman and crusader
- Mafalda of Pulla-Calabria, Norman noblewoman (b. 1060)
- Urse d'Abetot, Norman sheriff of Worcestershire
- Veera Ballala I, Indian ruler of the Hoysala Empire
- Wang, Chinese empress of the Song Dynasty (b. 1084)
- ^ Picard, Christophe (1997). La mer et les musulmans d'Occident au Moyen Age. Paris: Presses Universitaires de France. ISBN 2130488102.
- ^ McGrank, Lawrence (1981). "Norman crusaders and the Catalan reconquest: Robert Burdet and the principality of Tarragona 1129-55". Journal of Medieval History. 7 (1): 67–82. doi:10.1016/0304-4181(81)90036-1.
- ^ Kleinhenz, Christopher (2004). Medieval Italy: an encyclopedia, Volume 1. New York: Routledge. ISBN 0-415-93930-5.
- ^ Steven Runciman (1952). A History of The Crusades. Vol II: The Kingdom of Jerusalem, p. 90. ISBN 978-0-241-29876-3.
- ^ Steven Runciman (1952). A History of The Crusades. Vol II: The Kingdom of Jerusalem, p. 74. ISBN 978-0-241-29876-3.