This dissertation aims to analyze the current provision of regional architecture in South America; by doing so, in particular, through the systematic examination of the composition and the content of the main themes and agendas, which make up the most prominent regional institutions of the continent namely Mercosur, ALBA, and the Pacific Alliance. To fulfill this objective, the intente is to build a simple analytical model, centred around the perception that each one of these institutions have about four key institutional priority issues – institutional principles, productive integration, financial system and infrastructure and transport - and also involves regional integration; in order to Identify on which paradigmatic integrative guidelines such institutions are based, If the agendas between these institutions are: convergent, complementary or dissonant to each other; and the influence that the combination of the interactions between them exert, in relation to the current disposition of Regional Architecture in South America. This dissertation argues that the present layout of South American Regional Architecture subsists in modules.