The history of poetry is a history of repetition. Poetry has always been shaped by repetition, not only through the repetitive mechanisms of language itself but also through the meter, rhyme, structure, alliterations, anaphors, parallelisms, among other kinds of repetition at the structural, phonetic, rhetorical or lexical levels. In addition, repetition is also crucial for understanding literary periods and movements, as well as for grasping the relationships they establish with each other. Crucially, research has demonstrated how even the discourses of the avant-gardes, with their proposal of radical variation, are often linked to previous historical periods.