Rossella Fabbrichesi is Professor of Hermeneutics at the State University of Milan, Italy. She has been studied Peirce since her Ph.D. in Philosophy, publishing La polemica sull’iconismo (1983); Sulle tracce del segno (1986); Il concetto di relazione in Peirce (1992); Introduzione a Peirce (1993). She edited two anthologies of Peirce’s writings: La logica degli eventi (1989); Categorie (1992).She also worked on the link between Peirce and Wittgenstein (Cosa significa dirsi pragmatisti: Peirce e Wittgenstein a confronto, 2002; Peirce and Wittgenstein on Common Sense, 2004) and the connexions between both authors and the Leibnizian tradition (I corpi del significato. Lingua, scrittura e conoscenza in Leibniz e Wittgenstein, 2000; and, with F. Leoni, Continuità e variazione. Leibniz, Goethe, Peirce, Wittgenstein. Con un’incursione kantiana, 2005). Recently, she turned to the topic of a genealogy of sign in Greek thought (La freccia di Apollo. Semiotica ed erotica nel pensiero antico, 2006). She edits the first Italian web-site entirely devoted to Peirce (www.unimi.it/peirce/).Susanna Marietti is a Post-Doctoral Researcher and Assistant Professor in the Department of Philosophy at the University of Milan. After her earlier studies in formal logic, she became interested in the foundation of logic and mathematics, a topic she treats by making use of Peirce’s semiotics. Besides various essays on this subject, she authored a volume on Peirce’s philosophy of mathematics (Icona e diagramma. Il segno matematico in Charles Sanders Peirce, 2001), edited an Italian anthology of Peirce’s manuscripts (Pragmatismo e grafi esistenziali, 2003) and collaborated on the creation of the first Italian website dealing entirely with Peirce. She has also been conducting research on Kant’s and Wittgenstein’s philosophy. Susanna Marietti is the editor of various volumes on human rights and penal issues and belongs to the editorial board of Antigone, an Italian periodical on related subjects.