|Covid-19|Siege of Jerusalem during the First Crusade:
January 13 – Crusaders set fire to Mara, Syria.
June 7 – The First Crusade: The Siege of Jerusalem begins.
July 8 – 15,000 starving Christian soldiers march around Jerusalem.
July 15 – Christian soldiers under Godfrey of Bouillon, Robert II of Flanders, Raymond IV of Toulouse and Tancred take Jerusalem at the end of this difficult siege.
July 22 – The Kingdom of Jerusalem is founded in the Middle East.
August 12 – The Crusaders defeat the Fatimids at the Battle of Ascalon.
August 13 – Pope Paschal II succeeds Pope Urban II as the 160th pope.
Muhammad al-Idrisi (d. 1165)
Ranulf de Gernon, 4th Earl of Chester (d. 1153)
William X, Duke of Aquitaine (d. 1137)
Approximate date – Henry of Blois, Norman bishop of Winchester (d. 1171)
April 14 – Conrad, Bishop of Utrecht (b. before 1040)
April 20 – Peter Bartholomew (b. 1061)
July 29 – Pope Urban II (b. 1035)
December 3 – Saint Osmund (b. 1065)
El Cid, Castilian nobleman and military leader (b. 1043)
King Donald III of Scotland (b. before 1040)
Year 1099 (MXCIX) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar.