World history (801-999): 800–849 Charlemagne crowned first Holy Roman Emperor in Rome(800).Charlemagne dies(814),succeeded by his son, Louis the Pious, who divides France among his sons(817).Arabs conquer Crete, Sicily, and Sardinia(826–827). 850–899 Norsemen attack as far south as the Mediterranean but are thwarted(859),discover Iceland(861).Alfred the Great becomes king of Britain(871),defeats Danish invaders(878).Russian nation founded by Vikings under Prince Rurik, establishing capital at Novgorod(855–879). 900–949 Beginning of Mayan Post-Classical period (900–1519). Vikings discover Greenland(c. 900).Arab Spain under Abd ar-Rahman III becomes center of learning(912–961).Otto I becomes King of Germany (936). 950–999 Mieczyslaw I becomes first ruler of Poland(960).Eric the Red establishes first Viking colony in Greenland(982).Hugh Capet elected King of France in987;Capetian dynasty to rule until1328.Musical notation systematized(c. 990).Vikings and Danes attack Britain(988–999).Otto I crowned Holy Roman Emperor by Pope John XII(962).