Browse Historical Events by Day: What Happened on February 17th?

Roman Emperor Theodosius I dies, leading to the division of the Roman Empire between his sons Arcadius and Honorius.

Emperor Theodosius II is born, becoming one of the longest-reigning emperors of the Eastern Roman Empire.

The French Pope Boniface VIII issues the Papal bull "Unam Sanctam," asserting papal supremacy over secular rulers.

Battle of Rudau: Teutonic Knights defeat the Lithuanians under Grand Duke Vytautas.

Duke John the Fearless of Burgundy orders the assassination of his cousin, Louis I, Duke of Orléans, leading to a civil war in France known as the Armagnac-Burgundian Civil War.

The Congress of Arras is convened to negotiate peace between Burgundy and France during the Hundred Years' War.

The Battle of Rovine: Vlad the Impaler defeats a large Ottoman army, temporarily halting Ottoman expansion into Wallachia.

Vasco da Gama sets sail on his second voyage to India, aiming to secure Portugal's trade interests.

Kosovo formally declares independence from Serbia.