On March 11:
- 1513 - Giovanni de' Medici became pope as Leo X.
- 1818 - Mary Shelley's Frankenstein was published.
- 1845 - The First Maori War began between Maoris and British forces.
- 1941 - World War II: The Lend-Lease Act was signed into law.
- 1985 - Mikhail Gorbachev became leader of the Soviet Union.
On March 11:
- 1513 - Giovanni de' Medici became pope as Leo X.
- 1818 - Mary Shelley's Frankenstein was published.
- 1845 - The First Maori War began between Maoris and British forces.
- 1941 - World War II: The Lend-Lease Act was signed into law.
- 1985 - Mikhail Gorbachev became leader of the Soviet Union.