🇪🇬 Egypt · Archaeological wonder
Mons Porphyrites
Roman Imperial (18 CE–4th c. CE; peak Hadrianic 130–200 CE) · Roman
Mons Porphyrites (Jabal Abu Duhhan) is the world's only imperial porphyry source, 950 m Red Sea mountain, producing purple leucocratic andesine porphyry monolithic columns and sarcophagus of…