I'm planning to write a story set in a fantasy world (magic is real, but elves or dwarves don't exist). Few guilds, like traders, blacksmiths and artisans, play a role in the story. But while I was planning and mindstorming, I had to face one fact: I don't know almost anything about guild, their stucture etc. If you know something about medieval guilds, please, inform me. Thank you in advance.