"Pablo Picasso & Jaume Sabartés en toutes lettres"' project aims to study the different facets of Pablo Picasso's private secretary, in particular his role as a mediator of cultural transfers within different intellectual networks. The project is based on an epistolary corpus, on letters exchanged between Sabartés and Picasso during more than 6 years. Their letters represent a corpus of two thousand letters written in at least three languages (French, Catalan and Spanish) and traces decades of Picasso ans Sabartés lives. For 2021-2022, the project will study the letters between 1900 to 1945. URL: https://www.translitterae.psl.eu/picasso-et-sabartes/