These blank maps provide a historically inspired outline of late Byzantine Constantinople suitable for the addition of isometric art/assets.  It is a transformation of CPlakidas' excellent map "Byzantine Constantinople", which is in the Creative Commons (CC BY-SA 3.0). That work is the major source for the geographical outline and the placement of roads, walls, and gates.

There are two versions of this map.  The first makes only slight changes made to assist with usability.  The second reworks the street system to provide more angular standardization.  (I hope to better refine the latter in time.)

Background texture of this map is VWolfdog's Parchment (released here as CC0).