Year 1100 (MC) was a leap year starting on Sunday (link will display the full calendar) of the Julian calendar, the 1100th year of the Common Era (CE) and Anno Domini (AD) designations, the 100th year of the 2nd millennium, the 100th and last year of the 11th century, and the 1st year of the 1100s decade. In the proleptic Gregorian calendar, it was a non-leap century year starting on Monday (like 1900). Events By place Levant January – The Seljuk ruler Mahmud I is expelled from Bagdad by his brother Barkiyaruq, but Mahmud manages to retake the city, during his spring offensive. May or June – Raymond IV (Saint-Gilles) sails to Constantinople to obtain the support of Emperor Alexios I (Komnenos), in his attempt to seize Tripoli. August 1 – A Genoese fleet leaves Italy, to support the Crusaders' efforts to conquer the coastal cities; the ships reach Latakia on September 25. August – Battle of Melitene: Bohemond I is captured by the Danishmends, leaving Tancred as regent of the Principality of Antioch for two years. August 20 – With the support of the Venetian fleet, the Crusaders under Tancred capture the coastal city of Haifa. December 25 – Baldwin I is crowned first King of Jerusalem at the Church of the Nativity in Bethlehem, by Daimbert, the new Latin Patriarch of Jerusalem, following the death of the previous ruler, Baldwin's brother Godfrey of Bouillon, on July 18. After a success over the Armenians of Cilicia and the Emirate of Aleppo, Baldwin of Bourcq becomes Count of Edessa, with the support of Daimbert. Genoa, Venice and Pisa gain trading privileges from the Crusader states, in return for their service during the conquest of the coastal cities. Europe August 2 – King William II (or William Rufus) dies in a hunting accident in the New Forest. Sir Walter Tirel is accused of having shot the arrow, but flees the country to avoid a trial. Henry I claims the throne. August 5 – Henry I is crowned King of England, at Westminster Abbey. The power of the new monarch is ill-assured, and to mollify the barons he has to grant them the Charter of Liberties, one of the first examples of a written constitution in Europe. August 30 – After the failure of the Council of Liubech in 1097, the Congress of Vytechev establishes peace and the feudal system in Kievan