Bayezid I, nicknamed Yildirim, "the Thunderbolt", was the Sultan of the Ottoman Empire, from 1389 to 1402. He was the son of Murad I and Valide Sultan Gülçiçek Hatun. In 1394, Bayezid laid siege to Constantinople, the capital of the Byz...

John I, called the Good (sometimes the Great) or of Happy Memory, was the tenth King of Portugal and the Algarve and the first to use the title Lord of Ceuta. He was the natural son of Peter I by a noble Galician woman named Teresa Lourenço...

The Yongle Emperor, born Zhu Di, was the third emperor of the Ming Dynasty of China from 1402 to 1424. His era name means "Perpetually Jubilant". His usurpation of the throne is now sometimes called the "Second Founding" of the Ming. He is...

Giovanni di Bicci de' Medici was an Italian banker, the first historically relevant member of Medici family of Florence, and the founder of the Medici bank. He was the father of Cosimo de' Medici (Pater Patriae), and great-grandfather of Lo...

Richard II was the son of Edward the Black Prince, Prince of Wales, and Joan "The Fair Maid of Kent". He was born in Bordeaux and became his father's successor when his elder brother died in infancy. He was deposed in 1399 and died the next...

Henry IV was the King of England and France and Lord of Ireland from 1399 to 1413. He was born at Bolingbroke Castle in Lincolnshire, hence the other name by which he was known, "Henry (of) Bolingbroke". His father, John of Gaunt, was the t...

Charles VI, called the Beloved and the Mad, was the King of France from 1380 to 1422, as a member of the House of Valois. His bouts with madness, which seem to have begun in 1392, led to quarrels among the French royal family, which were ex...

Martin V, pope (1417–31), a Roman named Oddone Colonna; successor of Gregory XII. He was created cardinal by Innocent VII, and in the schism he attended and supported the decisions of the Council of Pisa. His election (Nov. 11, 1417) by the...

Sigismund was King of Hungary, of Croatia from 1387 to 1437, of Bohemia from 1419, and Holy Roman Emperor for four years from 1433 until 1437, the last Emperor of the House of Luxemburg. He was also King of Lombardy from 1431, and of German...

Jan Hus, sometimes Anglicized as John Hus or John Huss, was a Czech priest, philosopher, Master, dean and rector at Charles University in Prague, church reformer, founder of Hussitism, a seminal figure in the Bohemian Reformation and a key...

The Limbourg brothers, Paul, Jean, and Hermann, were a Netherlandish family of manuscript illuminators. All three died in 1416, presumably of the plague. Paul is thought to be the eldest and therefore the head of the workshop, but the firs...

Laurens Janszoon Coster or Laurens Jansz Koster, was one of the early European printers. He was an important citizen of Haarlem and held the position of sexton (Koster) of Sint-Bavokerk. He is mentioned in contemporary documents as an asses...

John the Fearless (French: Jean sans Peur, Dutch: Jan zonder Vrees), also John II, Duke of Burgundy, known as John of Valois and John of Burgundy, was Duke of Burgundy from 1404 to 1419. He was Regent for his mentally ill first cousin Charl...

Zheng He, formerly romanized as Cheng Ho, was a Chinese mariner, explorer, diplomat, fleet admiral, and court eunuch during China's early Ming dynasty. He was originally born as Ma He in a Muslim family, later adopted the conferred surname...

Francesco Petrarca was one of the great figures of Italian literature. He traveled widely in the service of the church, was involved in Italian politics, and wrote extensively. In 1341 he was crowned laureate at Rome for his poetry. Vari...