Okay, so in the future I plan to create another city-making tutorial (for the Alliance), but this time more of an article than a step-by-step tut. So I've been working hard researching medieval cities (i.e., having heaps of fun looking through books and calling it "work" )

I was inspired by the info-rich recent posts about canal cities, so I though I'd ask if you could help me out. What are the most important factor(s) you think about when designing medieval cities--and especially medieval city maps? Plus, what are the most interesting/important historical facts you remember reading/hearing?

I'll compile all these into the article, and there shall be great rejoicing!