This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Byzantine Constantinople. Detailed map of the City of Constantinople and its most important buildings in Byzantine times Found at washington edu html scan from Alexander van Millingen Byzantine Constantinople The Walls of the City and Adjoining Historical Sites John Murray London von Hubner PDArt Old maps of Istanbul Maps of