The Viking Age is the period from 793 AD to 1066 AD in European history, especially Northern European and Scandinavian history, following the Germanic Iron Age. It is the period of history when Scandinavian Norsemen explored Europe by its s...

Leo III, Saint, pope (795–816), a Roman; successor of Adrian I. He was attacked about the face and eyes by members of Adrian's family, who hoped to render him unfit for the papacy. Leo recovered and fled (799) to Charlemagne's protection at...

Gunpowder, also known as the retronym black powder to distinguish it from modern smokeless powder, is the earliest known chemical explosive. It consists of a mixture of sulfur (S), charcoal (C), and potassium nitrate (saltpeter, KNO3). The...

The Book of Kells (Irish: Leabhar Cheanannais), sometimes known as the Book of Columba, is an illuminated manuscript in Latin, containing the four Gospels of the New Testament together with various prefatory texts and tables. It was transcr...

The Dresden Codex is a pre-Columbian Maya book of the eleventh or twelfth century of the Yucatecan Maya in Chichén Itzá. The Maya codex is believed to be a copy of an original text of some three or four hundred years earlier. Historians sa...

Angkor is a name conventionally applied to the region of Cambodia serving as the seat of the Khmer empire that flourished from approximately the ninth century to the fifteenth century A.D. More precisely, the Angkorian period may be defined...

Basil I, called the Macedonian was a Byzantine Emperor who reigned from 867 to 886. Born a simple peasant in the theme of Macedonia, he rose in the Imperial court. He entered into the service of Theophilitzes, a relative of Emperor Michael...

Charles the Bald was the King of West Francia (843–877), King of Italy (875–877) and Holy Roman Emperor (875–877, as Charles II). After a series of civil wars during the reign of his father, Louis the Pious, Charles succeeded by the Treaty...

The Historia Brittonum, or The History of the Britons, is a historical work that was first composed around 830, and exists in several recensions of varying difference. It purports to relate the history of the Brittonic inhabitants of Britai...

Rurik or Riurik was a legendary Varangian chieftain who gained control of Ladoga in 862, built the Holmgard settlement near Novgorod, and founded the Rurik Dynasty, which ruled Kievan Rus (and later the Grand Duchy of Moscow and Tsardom of...

Verdun, Treaty of, the partition of Charlemagne's empire among three sons of Louis I, emperor of the West. Louis the German received the eastern portion (later Germany); Charles II (Charles the Bald) became king of the western portion (late...

Alfred the Great was King of Wessex from 871 to 899. Alfred is noted for his defence of the Anglo-Saxon kingdoms of southern England against the Vikings, becoming the only English king to be accorded the epithet "the Great". Alfred was the...

Tsar Simeon the Great was the ruler of Bulgaria, who reigned 893 - 927. He was 27 when he took the throne from his brother Vladimir, the son of Prince Boris, who was deposed and possibly blinded by his own father after his attempt to return...

Al-Farabi was a renowned scientist and philosopher of the Islamic Golden Age. He was also a cosmologist, logician, and musician. Through his commentaries and treatises, Al-Farabi became well known among medieval Muslim intellectuals as "...

Abd-ar-Rahman III was the Emir and Caliph of Córdoba (912–961) of the Ummayad dynasty in al-Andalus. Called al-Nasir li-Din Allah ("the Defender of God's Faith"), he ascended the throne in his early 20s, and reigned for half a century as th...