A city with different models.

why only on towns?
I just checked, I used this method to make a copy of an Elven town and gave it the model of a Royal Mausoleum (I didn't fix the tiles, just for testing).

Yes, you are right, it is possible; I was wrong.
Unfortunately, I can't use this town as a full-fledged one; when I try to enter it, the hero just stands there (in the place where the icon should appear for the hero to follow into the town, a gray castle icon appears). When I try to attack its garrison, the game crashes.
Can you tell me what the problem is?