Provenance study of marble artifacts from the Berenike (Egypt) archaeological site based on petrographic and isotopic data

Fragments of marble revetment and floor slabs as well as some broken statuary and vessels were recovered from the excavation of a Roman temple in the harbor town of Berenike on the Red Sea coast of Egypt. Petrographic analyses, including optical, cathodoluminescence, and scanning electron microscopy as well as isotopic analyses (δ¹³C, δ¹⁸O, ⁸⁷Sr/⁸⁶Sr), were conducted to determine the provenance of the marble. The aim was to reconstruct the commercial ties that led to this prized building stone being brought to Berenike. Most, if not all, of the slabs are of banded gray to white marble showing properties indicative of a Prokonnesian origin. This marble, exploited on Marmara Island (Sea of Marmara, Turkey) and extensively utilized throughout the Mediterranean, including Egypt from at least the second century A.D., might have been procured from the marble depots in Alexandria. This could have involved engaging a team of Bithynian master craftsmen for the project, presumably to embellish the main temple of the city during the reign of the Roman emperor Hadrian. The statuary and vessel finds are composed of white marble representing several sources. Some coarse-grained specimens were surely extracted in Prokonnesos. For others, the source is uncertain and the likely candidates are Prokonnesos, Paros (Cyclades, Aegean Sea), and Ephesos (Aegean coast of Asia Minor). The fine-grained varieties represented high-quality Dokimian (Afyon region, Asia Minor) and most likely expensive Parian (lychnites type) marble. Marble from the ancient Gebel Rokham quarries in Egypt was also examined for comparison, but its properties have excluded this source in the case of the marble artifacts from Berenike analyzed in this work.