This essay aims to review literary journalism both in Catalan and American Modernism, specifically through the works of Rubén Darío and Santiago Rusiñol, in order to achieve a better understanding of the contemporary idea of literary Cosmopolitanism. The framework to support this analysis goes from Desde el Molino, written by Rusiñol in Paris between 1890 and 1894, to the chapter devoted to Barcelona by Darío in España contemporánea, written between 1899 and 1901. Reading these works as journalistic reflections on modernity and cosmopolitanism also calls for considering the reactions against them, both from a political and aesthetic perspective, by some prominent Spanish writers. In this respect, the fin-de-siècle Catalan and American literature may be a key aspect concerning a redefinition of the cultural history of literary Cosmopolitanism.