Surprisingly good.
Few things, though. The roof on towers is of strange colour, if it represents clay tiles, then it's historically incorrect, since it just wasn't ever used, only wooden planks. So it should be dark grey, imo. The colour of walls and buildings is brown, so guess it's supposed to be wood, but you can't really tell, because the sturcture, the logs, aren't seen. And this way it looks more like some central European walls. So log structure should be made more visible, imo.
I'll try to give you some more idea how Russia looked back then. I'll start with the ancient times, if you don't mind. First, pre-medieval city should be entirely of wood. There should be no churches, until it reaches 6, and when it does, a small wooden one could be added. Now when it's 12 there can be some white limestone churches you drew, but overall stone building wasn't that spread until later times, cause Russia is basically one huge plain and rock or lime is scarce and is hard to transport through all the endless woodlands. And wood is everywhere, cheap and flexible.
I'll post some moar.
Overall, pretty good work