Catalog
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| Issuer | Alexandria (Egypt) |
|---|---|
| Year | 157-158 |
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| Shape | Round (irregular) |
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| Reverse description | Standing figure of Isis Pharia in full-length robes, advancing to the right with head turned back to the left, holding a billowing sail in her outstretched right hand and a sistrum in her left. The goddess is depicted in the characteristic Alexandrian type associated with the patroness of sailors and navigation. The regnal date L ΚΑ (Year 21) appears in the left field, dating the issue to the twenty-first year of Antoninus Pius's reign (157–158 AD). |
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| Mint | Alexandria (ancient), Egypt (332 BC - 476 AD) |
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| Additional information |
Year 21 of Antoninus Pius's reign fell squarely within the longest peaceful principate of the second century — no major wars, no succession crises, no currency collapses. Alexandrian billon tetradrachms of this period circulated heavily in Egypt, where Roman monetary policy maintained a closed currency system: coins brought into the province were exchanged for local issue, and local coins could not leave. That captive circulation explains the heavy wear found on most survivors.
The Dattari reference traces to Giovanni Dattari's personal collection, catalogued in 1901, which remains the foundational corpus for Alexandrian imperial coinage despite being over a century old.