I have this interesting idea for my world - note: while it is inherently science fiction, I've made a method that allows any kind of civilization, from pre-agricultural to post-singularity.
So, a simple idea for a simple fantasy empire: a kingdom with economy based on the industry of sweet things.
Imagine excess amount of three major resources:
sugar. Obviously, from sugar cane, beet and other "industrial-grade plants" used in real life.
honey. From enormous fields of bees, of course - and maybe some extraterrestrial animals. Also certain species of ants.
fruits. All kind you know from Earth, and extraterrestrial flora as well.
How would the industry of such a country look like, especially in pre-industrial era? Of course food industry would be by far the strongest, with gigantic confectionery chains, beverage factories and a lot of export logistics.
How would it affect civilian life, assuming a medieval European foundation of culture? I ask it in strictly economic aspects to keep on-topic; major jobs define cultural traits anyway.
Is it even probable at all that a medieval European culture can grow to a widely-known kingdom based on a resource like sugar? I mean, Romans did it with salt, but not only with salt.