Expiation City is a French township built for the purposes of ethical atonement and the rehabilitation of various master villains. Dr. Ox was admitted into Expiation City following the Quiquendone incident.
Expiation City appeared in P.S. Ballanches' La Ville des expiations (The City of Expiations, 1907). In the novel Expiation City is a dictatorship created for the sole purpose of social re-education and the atonement of moral and spiritual weaknesses.