| Clue | Source | Date |
|---|---|---|
| 609, in ancient Rome | Eugene Sheffer | 28 Apr 2020 |
| Early 7th-century date | Newsday | 18 May 2017 |
| 609, in ancient Rome | ||
| Early seventh-century year | ||
| Early seventh-century year | ||
| XXIX times XXI | ||
| 609, classically | ||
| CCIII tripled | ||
| CCIII x III | ||
| 7th-cen. date. |