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Team, H. S. R. (2018, January 24). Columns of Basilica Cistern, Istanbul.
World History Encyclopedia. Retrieved from https://www.worldhistory.org/image/7968/columns-of-basilica-cistern-istanbul/
Team, Hagia Sophia Research. "Columns of Basilica Cistern, Istanbul."
World History Encyclopedia. Last modified January 24, 2018.