Image Source
Plan of Constantinople by Giovanni Andreas di Vavassore, Byzantivm sive Costantineopolis, woodcut dated to ca. 1520 in Venice (Germanisches Nationalmuseum, Nuremberg) http://objektkatalog.gnm.de/objekt/SP8190 and http://de2d2g2qlnqhe.cloudfront.net/content/ucpjsah/69/1/62/F4.large.jpg. Accessed 9 Feb. 2017
