WHAT HAPPENED IN 1520.
Look what happened the 1520.

Sten Sture the Younger, the Regent of Sweden, is mortally wounded at the Battle of Bogesund. (19. January 1520)

The Revolt of the Comuneros begins in Spain against the rule of Charles V. (16. April 1520)

The massacre at the festival of Tóxcatl takes place during the Fall of Tenochtitlan, resulting in turning the Aztecs against the Spanish. (20. May 1520)

Pope Leo X threatens to excommunicate Martin Luther in papal bull Exsurge Domine. (15. June 1520)

Spanish conquistadors led by Hernán Cortés fight their way out of Tenochtitlan. (30. June 1520)

Spanish conquistadores defeat a larger Aztec army at the Battle of Otumba. (7. July 1520)

Ferdinand Magellan discovers a strait now known as Strait of Magellan. (21. October 1520)

João Álvares Fagundes discovers the islands of Saint Pierre and Miquelon, bestowing them their original name of "Islands of the 11,000 Virgins". (21. October 1520)

The Strait of Magellan, the passage immediately south of mainland South America connecting the Pacific and the Atlantic Oceans, is first discovered and navigated by European explorer Ferdinand Magellan during the first recorded circumnavigation voyage. (1. November 1520)

Stockholm Bloodbath begins: A successful invasion of Sweden by Danish forces results in the execution of around 100 people. (8. November 1520)

More than 50 people are sentenced and executed in the Stockholm Bloodbath (9. November 1520)

Danish King Christian II executes dozens of people in the Stockholm Bloodbath after a successful invasion of Sweden. (10. November 1520)

After navigating through a strait at the southern end of South America, three ships under the command of Portuguese explorer Ferdinand Magellan reach the Pacific Ocean, becoming the first European ships to sail from the Atlantic Ocean to the Pacific. (28. November 1520)

Martin Luther burns his copy of the papal bull Exsurge Domine outside Wittenberg's Elster Gate. (10. December 1520)