Detailed map of the City of <a href="//commons.wikimedia.org/wiki/Constantinople" class="mw-redirect" title="Constantinople">Constantinople</a> and its most important buildings in Byzantine times.
F.R. von Hubner
Found at <a rel="nofollow" class="external free" href="http://depts.washington.edu/silkroad/cities/turkey/istanbul/istanbul.html">http://depts.washington.edu/silkroad/cities/turkey/istanbul/istanbul.html</a>, scan from Alexander van Millingen, <i>Byzantine Constantinople: The Walls of the City and Adjoining Historical Sites</i>, John Murray, London 1899