| Answer | Crossword Clue |
|---|---|
| MIV | Year Pope John XVIII's reign began |
| MCC | Year in Pope Innocent III's reign |
| MDI | Year in Pope Alexander VI's reign |
| MCXV | Year in Pope Alexander I's reign |
| DLIV | Year in the reign of Pope Vigilius |
| DLII | Year in the reign of Pope Vigilius |
| CLI | Year in reign of Pope Pius I |
| DCII | Year in the reign of Pope Gregory I |
| CCIV | Year in the reign of Pope St. Zephyrinus |
