Towns & Resources, always very poor when new?

[Servius]

I've found that whenever I takeover a new territory, all the external sites (towns, mines, farms, ports, etc.) are classified as Very Poor. I've also found this to be the case when new towns spring up. Thus, I usually only build things that don't have a property value (schools, churches, etc.).

Do the classifications ever improve? Like, if you keep developing your town hall building, will the towns go from Very Poor/Meagre to Poor/Low to Average/Growing etc.?

[Mister V]

Some technologies improve the wealth of towns. Since the conquered territories probably aren't as developed as you are, it will take time (and upgrading buildings) for them to become wealthy.