Answer:
Catholicism
Religion. Religious freedom is guaranteed by the Spanish Constitution. The religion most practised is Catholicism and this is highlighted by important popular festivals, such as during Holy Week.The majority of the Spanish population is Catholic. The presence of Catholicism in Spain is historically and culturally pervasive. However, in the past 40 years of secularism since Franco's death, the role that religion plays in Spaniards' daily life has diminished significantly.
Step-by-step explanation:
just some fax ab the main religion in spain