This article proposes the study of cultural relations in the Río de la Plata area between 1927 and 1948. In particular, it analyzes the connections between groups and figures of traditionalism that, in urban settings, gathered to claim a rural past and evoke the figure of the gaucho as a symbolic reference for the nation (s). It is considered that the exploration of this network, forged centrally between Buenos Aires and Montevideo, reveals the composition of a common agenda that underlined the cultural coincidences between both countries and highlighted a Rioplatense identity, apart from strictly political relations between Argentina and Uruguay in the period. The personal archives of the traditionalists, added to a corpus of specialized magazines and institutional documentation of gaucho groups, reveal these links in three directions: the epistolary exchange through the Río de la Plata, the repercussions -public and private-of related events to the traditionalist interests and the empathies created around the private collections and gaucho museums.