Concept
Version 9
Created by Boundless
Architecture in the Early Byzantine Empire
Isidorus of Miletus and Anthemius of Tralles. Hagia Sophia, plan
a) Plan of the gallery (upper half); b) Plan of the ground floor (lower half)
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"640px-Hagia-Sophia-Grundriss.jpg."
https://commons.wikimedia.org/w/index.php?curid=387531
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Public domain.