Studies of the political impact of tithe collection in medieval and early modern Europe have tended to consider the phenomenon as secular taxation of church property. This article examines how, in the parts of the archdiocese of Lyon subject to the sovereign house of Savoy (Bresse, Bugey, and Valromey), the regional clergy assembly itself was responsible for tithe assessment and collection. Because of its control of this process, the Bresse clergy assembly was able to play a significant role in a regional political configuration that included a variety of actors, both clerical and secular. In Bresse, the secular ruler did not monopolize wealth extraction, and ecclesiastical politics were marked by the shifting roles and interests of multiple players.