Truly, truly fantastic!!!!!

I've got one of the Najewitz buildings to try out. I really like it. They're around 25 Euro a piece. But I really, really like your handmade stuff, especially the tiled floor on the open building - looks better than a lot of store bought stuff.
My own city is half done. I'm using the Grand Manner Harian's wall and Mile Castle set for the walls. I shelled out some bucks for four double-gate pieces as Grand Manner quit making them in May to make room for new stuff but they were critical for my city. I have to save for another Hadrian wall and mile castle set as one set is only about half the city. That gives me a couple of more barracks and stable buildings to finish the military quarter as well. I think seven more Najewitz buildings will fill two residential/market quarters and the Curtsey's Romano-British Church will fill out the governmental/administrative quarter. No one seems to make a commander's/governor's mansion that goes in the middle of Roman cities, so that looks like it will be a hand-made project.
Note that the doors on the Najewitz models are slightly smaller than Grand Manner, but I don't think that is such a big deal when everything is put together.
One thing I've been thinking about doing is the city streets. My idea is to take MDF boards, 2x2 or whatever best fits the layout, and covering them with plastic cobblestone sheeting and painting accordingly. Then just placing the buildings on top of that. That makes them modular like the rest of the city and walls and will allow different sized cities.
My idea was to have enough pieces to make a large city like Köln, York, cities on the Danube, or even a fort like Chester. That way one can also make smaller cities according to scenario.
I really like your city, keep the updates coming!