The Peace of Westphalia (1648) concluded the Thirty Years' War and established principles of sovereign states and non-intervention.

The Magna Carta, signed in 1215, limited the power of the English king and laid foundations for constitutional law.

Sputnik 1, launched in 1957 by the USSR, was the first artificial satellite, beginning the space race.

Marcus Aurelius, a Roman emperor and Stoic philosopher, wrote *Meditations*, reflecting on virtue, duty, and leadership.

The Mayan Long Count calendar ended a cycle in December 2012, which led to widespread doomsday speculations.

The ancient Olympics, starting in 776 BCE, were held at Olympia in honor of Zeus, king of the Greek gods.

The Treaty of Tordesillas split new overseas territories between Spain and Portugal, mediated by the Pope to avoid conflict.

Shakespeare wrote Hamlet, one of his greatest tragedies.

Carl Jung proposed the collective unconscious, a part of the unconscious mind shared by humanity, containing archetypes and symbols.

Seismology is the study of earthquakes and seismic waves, helping scientists understand Earth’s interior and predict seismic risks.