Title: Las Claves de Angeles y Demonios (The Keys to Angels and Demons) (Historia Incognita)
Subjects: Curiosidades y maravillas, Religión y ciencia, Crítica e interpretación, Religion and science, Secret societies, Curiosities and wonders, Miscelánea, History, Religious Mysteries, Illuminati, Miscellanea, Criticism and interpretation, Símbolos, Historia, Sociedades secretas, Signs and symbols, Misterios religiosos, Signos y símbolos