I'd agree with GP, and I think it'd be much more likely in ye olde times, when its much more difficult to just pick-up digs and move... they'd be more likely to create a smaller summer house or just expand the manor instead of just pick up and move... to me it seems that places were rarely sold by the rich.. they just bought more property... to me it seems a form of status and power.. but that's just a speculation...

I also knew that farmland could easily be spread-out beyond the confines of the map, but I wanted to suggest that the size of farmland required to support a city would probably be more than 3-4 family-run farms... which is to me what seems displayed on the map... (again, thinking of the region in general, not just the map shown... i tend to think about the big picture in the end, cause i find that even when you focus on a section, it becomes much more believable the broader the scope of your detail... also probably explains why i rarely finish a mapping project )