What is the national religion of Spain?
Religion in Spain
Catholicism became the state religion in 1851, when the Spanish government signed a Concordat with the Holy See that committed Madrid to pay the salaries of the clergy and to subsidize other expenses of the Roman Catholic Church as a compensation for the seizure of church property in the Desamortización de Mendizábal of 1835-1837. This pact was renounced in 1931, when the secular constitution of the Second Spanish Republic imposed a series of anticlerical measures that threatened the Church's hegemony in Spain, provoking the Church's support for the Francisco Franco uprising five years later.[41] In the ensuing Civil War, alleged Communists and Anarchists in Republican areas killed about 7,000 priests.