Le fonti di Piero Martinetti a partire dalle Carte inedite

Piero Martinetti's unpublished papers are preserved in the archive of the Accademia delle scienze in Turin and in the archive of the Casa e archivio Martinetti in Castellamonte. This article aims to bring to the attention of scholars the names of philosophers who contributed to the structuring of Martinetti's thought. The most important philosophers in Martinetti's formation were Wundt, Schuppe, Avenarius and many other less known thinkers. The rich material preserved in these two archives can help, on the one hand, to clarify decisive moments in the drafting of the treatise Introduzione alla metafisica (1902-1904); on the other hand, it offers the possibility to deepen chapters of European thought of the second half of the nineteenth century, which have rarely been studied by historians of philosophy