 Porphyry geology - Example Porphyries: Encyclopedia II - Porphyry geology - Porphyry in historyIn the Roman Empire, the palace room reserved for royal births was lined with Imperial Porphyry, and the emperors born in this room were referred to as porphyrogenitus ('born in the purple'). The Romans used the Imperial porphyry for the Pantheon's inlaid panels, for the togas in the sculpted portraiture of their emperors, and for the monolithic pillars of Baalbek's Temple of Heliopolis in Lebanon. Today there are at least 134 porphyry columns in buildings around Rome, all reused from imperia ...
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