Abstract
Even in the past the atom is present through its metaphors. The article focuses on the end of the world which acquires a particularly fertile space in medieval thought: the use of myth acts as a method of understanding and as an instrument of power through literature and history. The end of the Arthurian world and that of the union between East and West refer to imaginary and real scenarios in a unity not yet broken by fanaticism. Not only war (La mort le roi Artu and la Història de Jacob Xalabín), but also Love can be experienced as an apocalypse (Ausiàs March).