I'm not sure where this excellent map of Old Constantinople came from, but it's great. It wouldn't be as easy to use in a game as a boring old plan view of the city, and it's certainly not accurate to scale, but it's a wonderfully evocative image.

This is a modern image, but it's very reminiscent of 15th-16th century woodcut city maps I've seen from Northern Europe, especially Germany.

Zvezda KV1 (1941)

 Here'a another 1:100 scale (15mm) KV1 from Zvezda, a slightly later model than the previous one with a slightly better 76.2mm gun. ...