The Thieves' guild is part of the Tavern. It provides information on the relative strength of all the players. Each player is portrayed by a flag of their color which is placed further to the left depending on their rank regarding listed information.
The information from the thieves' guild is dependent on the number of towns you control.
One town - Number of towns, number of heroes and the name and portrait of the best hero of every team.
Two towns - Gold, wood & ore and the primary skills of the best heroes.
The information provided by the Thieves' guild is:
Number of Towns - Depending on quantity of Towns.
Number of Heroes - Depending on quantity of Heroes.
Gold - Depending on quantity of Gold.
Obelisks Found - Depending on number of puzzlepieces collected through Obelisks. (Note: In team play, puzzlepieces are collected together.)
Artifacts - Depending on number of artifacts of all your characters, both equipped and in backpacks.
Kingdom Army Strength - Depending on total strength of all your acquired armies combined.
Personality - Shows one of three characteristics; "Builder", "Warrior" or "Explorer". Human players are always shown as "Human".
Best Monster - Shows the most powerful monster in this teams army.
Heroes stationed inside your towns aren't counted for towards the Best Hero category, but this is not true for the strongest monster category.