On This Day

Historical Events in April 1521

  • Apr 7 Inquisitor-general Adrian Boeyens bans Lutheran books

Historic Event

Apr 7 Portuguese navigator Ferdinand Magellan's fleet reaches Cebu

Historic Event

Apr 16 Martin Luther arrives at the Diet of Worms assembly

  • Apr 18 Diet of Worms: Cardinal Alexander questions Martin Luther
  • Apr 21 Battle at Villalar: Emperor Charles I beats Communards
  • Apr 22 French King Francois I declares war on Spain
  • Apr 28 Treaty of Worms: Emperor Charles names his brother Ferdinand Archduke of Netherlands-Austria