Irene of Athens, Byzantine empress (797-802). She served (780-90) as regent for her son, Constantine VI, and later was made (792) joint ruler. Devoted to the Orthodox Church, she bent most of her efforts to suppressing iconoclasm. In 797 Ir...

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...

Basil II Porphyrogenitus, nicknamed the Bulgar Slayer, was senior Byzantine Emperor for almost 50 years (10 January 976 – 15 December 1025), having been a junior colleague to other emperors since 960. He and his brother Constantine were nam...

Alp Arslan was the second Sultan of the Seljuq Empire and great-grandson of Seljuq, the eponymous founder of the dynasty. His real name was Muhammad bin Dawud Chaghri, and for his military prowess, personal valour, and fighting skills he ob...

Urban is best known for starting the First Crusade. Urban's crusading movement took its first public shape at the Council of Piacenza, where in March 1095 Urban received an ambassador from the Byzantine emperor Alexius I Comnenus, asking fo...

Raymond IV of Toulouse sometimes called Raymond of St Gilles was Count of Toulouse, Duke of Narbonne, and Margrave of Provence and one of the leaders of the First Crusade. He was a son of Pons of Toulouse and Almodis de La Marche. He receiv...

Peter the Hermit, French religious leader. In 1095 he was a very successful preacher of the First Crusade, and he led one of its bands. In 1096 he reached Constantinople with his undisciplined followers; when they arrived in Asia Minor, Pet...

Bohemond I, Prince of Taranto and Prince of Antioch, was one of the leaders of the First Crusade. The Crusade had no outright military leader, but instead was ruled by a committee of nobles. Bohemond was one of the most important of these l...

Baldwin I of Jerusalem, was one of the leaders of the First Crusade, who became the first Count of Edessa and then the second ruler and first titled King of Jerusalem. He was the brother of Godfrey of Bouillon, who was the first ruler of th...

Godfrey of Bouillon was a leader of the First Crusade. He was either the eldest or the second son of Eustace II, Count of Boulogne, and Ida, daughter of Godfrey III, Duke of Lower Lorraine. He was designated by his uncle, Godfrey the Hunchb...

Anna Komnene, Latinized as Comnena, was a Greek princess, scholar, physician, hospital administrator, and the daughter of Emperor Alexios I Komnenos of Byzantium and Irene Doukaina. She wrote the Alexiad, an account of her father’s reign, w...

Enrico Dandolo was the 41st Doge of Venice from 1195 until his death. Remembered for his blindness, piety, longevity, and shrewdness, he is infamous for his role in the Fourth Crusade which he, at age ninety, directed against the Byzantine...

Baldwin I, the first emperor of the Latin Empire of Constantinople, as Baldwin IX Count of Flanders and as Baldwin VI Count of Hainaut, was one of the most prominent leaders of the Fourth Crusade, which resulted in the capture of Constantin...

Güyük was the third Great Khan of the Mongol Empire. He was the eldest son of Ögedei Khan, grandson of Genghis Khan, and reigned from 1246 to 1248. Genghis Khan's sons and grandsons were haunted by alcoholism, a vice that Genghis himself ha...

Möngke Khan, also transliterated as Mongke, Mongka, Möngka, Mangu or Mangku, was the fourth Great Khan of the Mongol Empire from July 1, 1251 – August 11, 1259. He was the first Great Khan from the Toluid line. Under Möngke, the Mongols con...