William the Conqueror, also known as William I, was the first Norman king of England. He led the Norman invasion of England in 1066, defeating the English army at the Battle of Hastings.

Frederick Barbarossa was the Holy Roman Emperor during the Third Crusade. He led a large army of German crusaders to the Holy Land in 1189, but died of drowning in a river in Turkey before reaching Jerusalem.

Richard I of England, also known as Richard the Lionheart, was a French king who ruled England from 1189 to 1199. He was a skilled military leader and participated in the Third Crusade.

Hugh Capet was the first king of the Capetian dynasty in France. He was elected king in 987 and ruled until his death in 996. The Capetian dynasty ruled France for over 800 years.

John of England signed the Magna Carta in 1215. The Magna Carta was a charter that limited the power of the king and protected the rights of the barons and other free men.

Constantine XI Palaiologos was the Byzantine emperor during the fall of Constantinople to the Ottoman Turks in 1453. He died defending the city during the siege.

Edward, Prince of Wales, also known as the "Black Prince", was the eldest son of King Edward III of England. He was a skilled military leader and fought in many battles during the Hundred Years' War.

Genghis Khan was the first Mongol emperor. He united the Mongol tribes and led them to conquer a vast empire that stretched from the Pacific Ocean to the Caspian Sea.

Louis XIV was known as the "Sun King". He ruled France from 1643 to 1715 and was one of the most powerful monarchs in European history.

Henry IV was the Holy Roman Emperor during the Investiture Controversy. The Investiture Controversy was a conflict between the pope and the emperor over who had the right to appoint bishops and other church officials.

Edward I was known as the "Hammer of the Scots". He conquered Scotland and forced the Scottish king to recognize him as his overlord.

Justinian I was the Byzantine emperor during the Nika riots in Constantinople. The Nika riots were a series of riots that took place in Constantinople in 532 AD.

Louis IX was known as the "Good King". He was a pious and just ruler who was devoted to the welfare of his people.

Otto IV was the Holy Roman Emperor during the Battle of Bouvines. The Battle of Bouvines was a battle between the French and English armies that took place in 1214.

Henry III was known as the "Winter King". He was a weak and ineffective ruler who lost most of the English possessions in France.