The "settlement view" feature is not present in M2TW, so cities can be designed as battlegrounds rather than as places where peasants mill about randomly, IIRC. That means trenches, spikes rubble etc.
In the mod "De Bello Mundi", new buildings are already started:
http://www.twcenter.net/forums/showt...66#post6532066
Spoiler Alert, click show to read:
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