Building Slots

[Lord of the Isles]

Are there no limits to the port line of buildings in coastal towns vs coastal cities? I've found that I can't access the Military Wharf structures outside of coastal cities, at least for Hellenistic provinces (all requirements met of course). Seems that it may coincide with the restrictions put on the military line of structures. Can anyone confirm this? I have regions with coastal towns all over the place where I'd like to upgrade my naval recruitment chains, but can only access the Shipwright line of buildings, and I have strong treaties with the cities in the provinces so I haven't taken them as well.

Ah, I forgot that restriction. You are right: towns can only build 3 of the 4 subsets in the port line: Trade port, Fishing port and Shipwright, but not the Military Wharf. The Shipwright subset is a kind of combination Trade/Military port with some warships but not as good as the ones from the Military Wharf. I found that out by trial and error when trying to get a Military Wharf in Neapolis (since Roma itself doesn't have a coastal port slot). Eventually figured out it was impossible and built the Military Wharf in the Sardinian Capital (Karalis?).

Edit: Also, towns just get up to level 3 in all port lines - only coastal cities get to build the level 4 upgrades.