“It is a sight to behold: like a giant spider web - dozens upon dozens of rope bridges and lines are strung between the hills of the district. And the people. They move along these slender swaying lines as if they were walking down a boulevard.”, The Journal of Mathius Redcap
In addition to the Thieves' Guilds, there is a hierarchy that all thieves are part of. Rank is based on skill, and can be raised or lowered at any time. The Queen of Thieves, the greatest living thief in the world, is the ruler. Guildmasters answer only to her, and she answers to no one at all.