Year 1190 (MCXC) was a common year starting on Monday (link will display the full calendar) of the Julian calendar.
June 10 – Third Crusade: Frederick I Barbarossa drowns in the Saleph River while leading an army to Jerusalem.
November 24 – Isabella of Jerusalem marries Conrad of Montferrat at Acre, making him de jure king.
The Teutonic Knights are founded to defend the Latin states in the Levant.
In Myanmar, Anawrahta's lineage regains control with the assistance of Sri Lanka. Pagan has been in anarchy. The new regime reforms Burmese Buddhism on Sri Lankan Theravada models.
February – Anti-Jewish riots break out in England.
March 16 – A massacre and mass-suicide of the Jews of York, England, led by Richard Malebys, result in the deaths of 150–500 Jews in Clifford's Tower.
July 4 – Richard I of England and Philip II of France, having met at Vézelay, set out from Marseille to join the Third Crusade.
October 4 – Richard I of England threatens war against Tancred of Sicily, and captures Messina.
Battle of Stara Zagora: The Bulgarians defeat Byzantine Emperor Isaac II.
The Almohad caliph, Yaqub al-Mansur, fails to reconquer Silves, Portugal.
Henry I becomes Duke of Brabant.
On the Harmony of Religions and Philosophy (ar. Kitab fasl al-maqal), by Averroes, is first published.
Speculum Virginum, a German manuscript, is published (approximate date).
First known foreign scholar commences study at what will become the University of Oxford in England, Emo of Friesland.
Cartmel Priory is founded in England.
Stefan Nemanja founds the Studenica monastery in Serbia.
Vincent of Beauvais, Dominican friar and encyclopedist (d. 1264)
Peter I, Duke of Brittany (d. 1251)
William III of Sicily (d. 1198)
March 15 – Isabella of Hainault, queen of Philip II of France (b. 1170)
June 10 – Frederick Barbarossa, Holy Roman Emperor, (drowned) (b. 1122)
July 25 – Sibylla, Queen of Jerusalem (b. c. 1160)
September 20 – Adelog of Hildesheim, German bishop
Ranulf de Glanvill, chief justiciar of England
Robert de Beaumont, 3rd Earl of Leicester
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