Charles V

Charles V was elected Holy Roman Emperor, defeating Francis I of France through extensive bribery of the prince-electors. This election united the Habsburg lands in Spain, Austria, the Netherlands, and the Holy Roman Empire under his rule.

Charles V presided over the Diet of Worms, where Martin Luther was summoned to recant his teachings. Luther refused, and Charles issued the Edict of Worms, declaring Luther an outlaw and banning his writings, escalating the Protestant Reformation.

Imperial forces under Charles V defeated and captured Francis I of France at Pavia in Italy. This victory secured Spanish dominance in Italy and forced Francis to sign the Treaty of Madrid, though he later repudiated it.

Mutinous imperial troops under Charles V sacked Rome, looting the city and besieging Pope Clement VII in Castel Sant'Angelo. This event shocked Europe and forced the Pope to align more closely with Charles, leading to the coronation of Charles as Holy Roman Emperor by the Pope in 1530.

Charles V abdicated his thrones, dividing his empire between his son Philip II (Spain, Netherlands, Italy) and his brother Ferdinand I (Holy Roman Empire). This division reflected the administrative challenges of ruling a vast, multi-ethnic empire.