During the Democratic Sexennium (1868-1874), federal republicanism and Carlism created very serious problems a l state. This book deals with the ideological universe of one of these movements, Catalan Carlism, the transversal role played by the defense of the Catholic religion, and the restoration of a forality m is imagined than understood. Combining Catholicism and foralism, we delve into a complex and debated subject: the origins of Catalanism.