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Portus Julius is a submerged site in Italy, Europe. Parco Archeologico dei Campi Flegrei dates it to c. 37 BCE.
A Roman naval harbor at Baiae now under the sea.



Guide answers and timeline insights related to this Wonder.
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Compare the published evidence and its interpretations. “Consensus” records the mainstream account; “Alternative” identifies a competing interpretation, not an equally established conclusion. Estimates and unresolved questions remain qualified in the claim text.
| Field | Consensus | Alternative |
|---|---|---|
| Date | 37 BCE - 100 CE c. 37 BCE Parco Archeologico dei Campi Flegrei | No claims found. |
| Purpose | Naval harbor Parco Archeologico dei Campi Flegrei | No claims found. |
| Method | No claims found. | No claims found. |
Calculating elapsed time...
Approximate - counted from January 1, 32 CE (UTC). Based on the midpoint of 37 BCE - 100 CE; the underlying date is uncertain.
| Unit | Completed total |
|---|---|
| Centuries | — |
| Decades | — |
| Years | — |
| Days | — |
| Hours | — |
Each row is an independent total of the same span, not a breakdown to add together.