The porphyry column at the Forum of Constantine, today Cemberlitas Square, at Istanbul.
The Burht Pillar.
AULDJO, John, Esq. F.G.S. Journal of a Visit to Constantinople, and some of the Greek Islands, in the Spring and Summer of 1833, London, Longman, Rees, Orme, Brown, Green, & Longman, 1835.
Architecture and built environment
The Gennadius Library - The American School of Classical Studies at Athens