The Nameless Thirteenth is the thirteenth god of the Twelve Gods, although only believed in by the "Right People". He is the god of thieves and crime, and his name is not to be spoken, thus he goes by many titles, among them the Crooked Warden, the Benefactor, the Thiefwatcher and Father of Necessary Pretext.

Locke Lamora is a priest of the Nameless Thirteenth, as was Father Chains before him.

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