History
1080
General
Population: 292 Million*
- Medicine: Constantine the African compiles medical work disguised as a monk and helps the public have medical information
- Religion: Order of the Hospital of St. John (Knights Hospital) in ITA founded
- Science: Creation of Toledan table of positions of stars - in Spain
- Deaths: Rudolf of Swabia
Europe
- General: Consecration of Otranto Cathedral
- Armenia: Armenian state established in Cilicia
- Denmark: Canute IV the Saint becomes King of Denmark to 1086
Famine
- England: William the Conqueror refuses to pay homage to the pope
- Holy Roman Empire: Henry IV again deposed and excommunicated by Pope Gregory – end of civil war
Middle East
- Construction of the Friday Mosque in Isfahan