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PASTES.
165
glass; and we know that Adrian sent to his friend Ser­vian, as a memento of his sojourn there, two precious glass cups (calices allasontes versicolores), which had been given him by the priest of the temple of Serapis, in Alexandria.*
After the Antonines, the art of making glass continued to flourish in Rome. This is proved by the sacred vases found in the catacombs, where, on white and transpa­rent glass, we see figures and inscriptions in gold, all in the rough style of the period, i.e., from the fourth to the eighth century, f
The dark barbarism of mediaeval times makes any research useless as to the arts in glass in the Middle Ages ; but the ornaments in engraved bronze, and in intaglio filled with enamel, also the stained glass in some sanctuaries, prove that it continued to the fifteenth century.
At this period, the ancient tradition of this art having perhaps been preserved in Rome and Venice, we find that it already flourished there, engraved pastes being made there of every description, in imitation of gems and glass. Of this we have proof in the laboratory of Murano, where probably the identical method of the Tyrrhenians was preserved.
In 1691, the Duke of Orleans, Eegent of France, established a great laboratory of paste intagli in the Palais Royale at Paris, under the direction of the chemist Homberg. In this factory beautiful works
* King, ' Antique Gems,' page 74. f Garucci, ' Vetri Ornati.'