Cádiz is a Spanish city, capital of the Province of Cádiz, in Andalusia. It is the southernmost capital in the Iberian Peninsula. The population is 130,000, but it is the centre of a metropolitan area, the Bay of Cádiz, with more than 500,000 inhabitants. Majority of its inhabitants follow Catholic Church. The Cádiz Cathedral is the seat of the Diocese of Cadiz y Ceuta. The cathedral was declared Bien de Interés Cultural in 1931.