The Arxiu Provincial de l’Escola Pia de Catalunya has been housed since 1973 in the same building as the Provincial Curia in Barcelona. It preserves documents, books and heritage objects produced by or belonging to the province and the Piarists of Catalonia from the end of the 17th century to the present day, the bibliographical heritage being even older because it is the repository of the historical collection of the seminary of Moià and the libraries of the Catalan Piarist schools. Every year we publish our activity report in the magazine “Catalaunia”, and now we present for the first time an extract of it through “Ephemerides” to make us known to the entire Piarist world community and contribute with it to highlight the value of preserving the documentary heritage and dissemination of the Piarist activity.