| Clue | Source | Date |
|---|---|---|
| 554, in letters | Wall Street Journal | 05 Sep 2020 |
| 554, to Cato | Eugene Sheffer | 08 Jun 2020 |
| Roman 554 | Wall Street Journal | 13 Aug 2019 |
| Roman 554 | ||
| MDCLXII ÷ III | ||
| 554, in stone | ||
| MDCLXII ÷ III | ||
| Half of MCVIII | ||
| Half of MCVIII | ||
| Mid sixth-century year | ||
| Year in the reign of Pope Vigilius | ||
| 554, to Nero | ||
| 554, in stone | ||
| Year in the reign of Pope Vigilius | ||
| Year in Vigilius' papacy | ||
| 554, in old Rome | ||
| Mid 6th-century year | ||
| 554, in stone | ||
| Mid 6th century year | ||
| Half of MCVIII | ||
| MCVIII/II | ||
| MDCLXII / III | ||
| Year in Vigilius's papacy | ||
| Sixth-century date | ||
| Caesar's 554 | ||
| Year in Justinian I's reign | ||
| Hadrian's 554 | ||
| Half of MCVIII | ||
| Roman 554 | ||
| Year in Justinian's reign. | ||
| 554. | ||
| 554 | ||
| MCVIII halved |