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.
Ah...THAT explains something that's been bugging me. I'd been wondering why I couldn't get a 6th slot in Rome when I had other (coastal) provincial capitals with 6 slots. Likewise why some towns were 4 slots while others were only 3. Makes sense now.