Why can't I build anything in these towns?

[Lucky Forward]

Yes, it looks like I need to get my population up, but I didn't know tax levels affected this. I've been keeping the tax rate at very high if my public order is over %100, just for the income. I'll have to take a second look at that in some of my towns. Thanks.

[katank]

When you get capped like this, do enslaving or peasant migration exploit.

Also, make sure that the temples are your own. This is a good time to rip down foreign temples and build your own as you have free construction time.

Note: never rip down a Sacred Circle of Epona when Romans. This can upgrade to Pantheon of Epona which is your own and gives +5 xp.