| Answer | Crossword Clue |
|---|---|
| DCI | Year in St. Gregory I's reign |
| DCI | Year in the reign of St. Gregory I |
| DCI | Year in St. Gregory I's papacy |
| DCII | Year in the reign of Gregory I |
| DCII | Year in the reign of Pope Gregory I |
| CCC | Year in St. Marcellinus' reign |
| LVI | Year in St. Peter's reign |
| MLII | Year in the reign of St. Leo IX |
| CCIV | Year in the reign of Pope St. Zephyrinus |
| CLI | Year in the reign of St. Pius I |
