With the creation of the Parliament of Catalonia in 1980 and the publication of Barcelona City Council's new Museums Plan in 1984, the provisional move of the Library from the Ciutadella to the Casa de la Caritat was tackled. The Library stayed in this place from 1987 to 1990, the year it was made part of the new project to create the Museu Nacional d'Art de Catalunya.

1991 News items in the press

The new siting of the Library in the old Convent of Sant Agustí is announced.

With the enactment of the Museums Law of 1990, the Library ceases to be a specialised municipal library and becomes part of the Museu Nacional d'Art de Catalunya. The MNAC Board of Trustees is established and the provisional installation of the Library on the second floor of the old convent of Sant Agustí is approved, awaiting the definitive move to the Palau Nacional on Montjuïc. The Library becomes part of a new museum project.