The Directorate-General for the Book, Archives and Libraries (DGLAB), under the aegis of the Ministry of Culture, aims to plan and support the development of the Portuguese Public Library Network (RNBP).
To this end, the DGLAB provides technical and financial support to municipalities for the creation and installation of public libraries, as well as plans and develops services for the libraries.
At the moment, the RNBP integrates 215 central public libraries.
DGLAB has been collecting statistical data since 1993 through the RNBP annual survey. See General chart of library resources and services.