Sigismund, Holy Roman Emperor

Sigismund was born in Nuremberg, the second son of Charles IV, Holy Roman Emperor, and his fourth wife, Elizabeth of Pomerania. His father's death in 1378 left the Luxembourg dynasty divided, and Sigismund's elder brother Wenceslaus inherited the imperial crown. Sigismund was married to Mary, Queen of Hungary, in 1385, and after her death in 1395 he consolidated his rule in Hungary, where he faced constant baronial opposition and Ottoman incursions. His election as King of the Romans in 1410 (and again in 1411) came after the deposition of Wenceslaus, and he was crowned Holy Roman Emperor only in 1433, after a long delay caused by papal conflicts and his own military campaigns.

Sigismund convened the Council of Constance (1414–1418) to end the Western Schism, which had produced three rival popes. The council elected Martin V as the sole pope, but it also condemned Jan Hus, who was burned at the stake despite Sigismund's promise of safe conduct—a betrayal that fueled the Hussite movement in Bohemia. After the death of King Wenceslaus in 1419, Sigismund claimed the Bohemian throne, but the Hussites rejected him, leading to a series of crusades (1420–1431) that ended in repeated imperial defeats. The Hussite Wars were finally settled at the Council of Basel, where the moderate Utraquists were granted concessions, allowing Sigismund to be accepted as King of Bohemia in 1436, just a year before his death.

Sigismund's imperial policy focused on securing dynastic lands and curbing the power of the princes. He created the Order of the Dragon in 1408 to defend Hungary against the Ottomans and to bind loyal nobles to his cause—an order that later included Vlad II Dracul, father of Vlad the Impaler. He also reorganized the imperial chancery and promoted the use of German as an administrative language. His diplomacy extended to the Baltic, where he mediated in the Polish–Lithuanian–Teutonic conflict, and to the Balkans, where he sought to unite Christian powers against the Ottoman advance. Despite these efforts, his reign saw the erosion of imperial authority, as the princes gained greater autonomy, and his financial troubles forced him to pawn imperial cities and crown jewels.

Sigismund was a polyglot who spoke German, Hungarian, Czech, French, and Latin, and he was known for his eloquence in diplomatic settings. He was also a patron of the arts and learning, founding the University of Óbuda in 1395, though it did not survive long. His second wife, Barbara of Cilli, was accused of plotting against him, and their strained relationship became a subject of court gossip. Sigismund was the last emperor of the Luxembourg dynasty; his son-in-law Albert II succeeded him, but Albert's reign lasted only two years. Sigismund's tomb in Oradea (now in Romania) was later desecrated, and his remains were lost. He also holds the distinction of being the only Holy Roman Emperor to have been crowned in Rome twice—once as King of the Romans and once as emperor—though the second coronation was delayed by a decade.

Western Schism

A split in the Catholic Church from 1378 to 1417 when there were rival popes in Rome and Avignon.

Hussites

Followers of Jan Hus, a Bohemian reformer, who fought for religious and national autonomy.

Order of the Dragon

A chivalric order founded by Sigismund in 1408 to defend Hungary against the Ottomans.

Utraquists

A moderate Hussite faction that advocated communion in both kinds (bread and wine) for the laity.