Quote Originally Posted by andrewt View Post
Cities are limited to 5 slots, including the settlement. Towns are limited to 3 slots. Ports do not count towards the limit.
Eureka! In an earlier post in this thread I'd speculated that increased level of settlement building (in cities and towns) allowed that 6th or 4th building slot to become available but since then I've realised I was wrong. And you have cracked it - a port gives the extra 'free' slot.

Except (possibly): I'm playing a game as Athens and Sparta's home region belongs to me. Not being coastal it only has 3 slots and now growth has stopped in the province so no more slots will appear. I wondered how tough that would make a start as the Spartan faction - no port and only 3 slots in home region - so I started a game as Sparta. While my home region only had 3 slots there was growth beginning which presumably would eventually lead to an extra slot.

Has anyone played Sparta yet for long enough to get growth to actually provide an extra 4th slot in their home region?