Cathedral building, part of my PD-licensed game map clipart collection.
Why not to add cross?
The cross should be trivial to add since I provided the source as SVG. Without cross it is not tied to Christianity so it can be reused more easily.
I just want you to know how epic I think all of your game art is. I'm going to be using a lot of it in a browser game I'm building and it is perfect.
When you have that browser game in a somewhat usable state, please do post a link, I am really curious to see it.