The main focus of this dissertation is to investigate the aesthetic proposals for poetry that unfold from the second cycle of avant-garde in Brazil, specifically those of concrete poetry, from a perspective of their effects on present days. Taking as a reference the works of Augusto de Campos and Haroldo de Campos, the aim is to identify the conceptual and creative set connected to the postulates of a poetics of invention which, from the moment of the creation of concretism in the middle of the 1950 s – but especially afterwards, in the condition of post or ex-concretes –, has been inserting significant information in the aesthetic debates of the end of modernity. The scope of this action is broad, oriented both by the transgressive spirit of the avant-garde and by the recovery of a tradition of the new sustained in an aesthetic-theoretical, translational paideuma. This work is guided by the hypothesis that the proposal of a new aesthetic of invention as an unconditional task in artistic creation survived (and survives) the decline of these same avant-gardes. In this sense, a part of the research aims at evaluating the solutions formulated by the Campos brothers — solutions that focus on the principle of a poetics of invention bound to acting in the limits of language based on the unconditional experience of the new. Another part, which is what we aim to evaluate, is the measure of this perspective today: if it can mean more than information coming from experiences of a historical avant-garde; if there are enough elements to postulate that the legacy of invention, as proposed since the inaugural moment of concretism, remains an unavoidable reference also contemporaneously.