History
1040
General
Population: 273 Million*
- Entertainment: Guido d'Arezzo introduces names for musical pitches
- Medicine: Petrocellus writes "Practica" an important medical work
- Deaths: Duncan of Scotland at the hand of Macbeth
Europe
- England: Harold I Harefoot dies and is succeeded by Hardicanute the last Danish king of England
Ride of "Lady Godiva" to protest tax (disputed)
- France: "Truce of God" proclaimed in Aquitaine
- Scotland: Murder of Duncan I of SCO by Macbeth Mormaer of Moray at Battle at Elgin – Macbeth rules as King of Scots
Middle East