El Siglo Futuro was a Spanish Traditionalist/Integrist daily newspaper, published in Madrid between 1875 and 1936.

Ramón Nocedal Romea (1842–1907) was a Spanish Catholic ultraconservative politician, first member of the Neocatólicos, then of the Carlists, and finally of the Integrists. He is known as leader of a political current known as Integrismo (1888–1907) and a chief representative of Catholic fundamentalism when applied to politics.