| Clue | Source | Date |
|---|---|---|
| In 550BC, this Persian king founded an empire which later became the world's largest in history so far | The Times Specialist Sunday | 12 Oct 2025 |
| Who founded the First Persian Empire? (5,3,5) | ||
| King of Persia who founded the Persian empire (5.3.5) | ||
| Founder of the first Persian Empire | The Times Specialist Sunday | 14 Jul 2019 |