The provenance and technology of Near Eastern glass: Oxygen isotopes by laser fluorination as a complement to strontium

The ability to make rapid measurements on small samples using laser fluorination enhances the potential of oxygen isotopes in the investigation of early inorganic materials and technologies. delta O-18 and Sr-87/Sr-86 values are presented for glass from two primary production sites, four secondary production sites and a consumer site in the Near East, dating from Late Antiquity to the medieval period. delta O-18 is in general slightly less effective than Sr-87/Sr-86 in discriminating between sources, as the spread of measured values from a single source is somewhat broader relative to the available range. However, while Sr-87/Sr-86 is derived predominantly from either the lime-bearing fraction of the glass-making sand or the plant ash used as a source of alkali, delta O-18 derives mainly from the silica. Thus the two measurements can provide complementary information. A comparison of delta O-18 for late Roman - Islamic glasses made on the coast of Syria-Palestine with those of previously analysed glasses from Roman Europe suggests that the European glasses are relatively enriched in O-18. This appears to contradict the view that most Roman glass was made using Levantine sand and possible interpretations are discussed.

On becoming pope in late antiquity

To an extent unusual among holders of papal office in late antiquity, we know something of the family of Gregory the Great (590-604). His father, Gordianus, was a wealthy Roman who had married a lady named Silvia, who herself had a sister named Pateria, while he had another three aunts, Aemiliana, Gordiana, and Tarsilla, the sisters of his father.(1) He also seems to have had one, and possibly a second brother.(2) We know from his writings that his three aunts on his father's side adopted a religious life in common, but they attained very different levels, for Gregory reports that, whereas Gordiana disgraced herself by marrying a farmer on her estates, Tarsilla reached the highest level of holiness. He describes his great-great-grandfather Felix, a bishop of the Roman church, appearing to her in a vision in which he showed her a mansion of great brightness and told her to come, for he would receive her there; soon afterwards, she died of fever.(3) While such details may appear sparse, they provide a basis on which we can make some general statements on the kinds of people who became pope in the period from the late fifth to the early seventh centuries; a table of these popes is appended to this paper. We shall suggest that there was a set of criteria which were met by new popes time and time again, and that these remained surprisingly constant across the period.