Across
- 6. Queen of Castile and sponsor of Christopher Columbus.
- 10. Aviation pioneer and the first female aviator to fly solo across the Atlantic.
- 12. Disciple of Jesus in the New Testament.
- 14. Italian Renaissance polymath, painter, and inventor.
- 16. French military heroine of the Hundred Years' War.
- 18. Architect of the Pantheon in ancient Rome.
- 19. Prime Minister of the United Kingdom during World War II.
- 20. Emperor of Japan during World War II.
Down
- 1. Cuban revolutionary and political leader.
- 2. Long-reigning monarch of the United Kingdom during the 19th century.
- 3. Last Pharaoh of ancient Egypt.
- 4. Austrian composer of the Classical era.
- 5. Founding Father, inventor, and polymath.
- 7. Leader of the Indian independence movement.
- 8. Anti-apartheid revolutionary and former President of South Africa.
- 9. Inventor of the printing press.
- 11. Pioneer in radioactivity and the first woman to win a Nobel Prize.
- 13. Key figure in the Protestant Reformation.
- 15. Founding Father and principal author of the Declaration of Independence.
- 17. Roman military and political leader.