Major Events
- Jul 3 Battle at Hagenoorde: German emperor beats earl Egbert II
Who Died in 1090
- Apr 16 Sikelgaita, Lombard princess, wife of Robert Guiscard, Duke of Apulia and Calabria, who often went into battle, armed, dies at about 50
- Jul 3 Egbert II van Brunswick, Fries count, dies in battle