The first documented news about the Council of L’Arboç date from 1062. In 1076, its castle was sold to the Count Ramon Berenguer I, belonging to the House of the Counts of Barcelona. It was later incorporated to the Crown of Aragon. In 1174, L’Arboç was given the title of “villa real”, becoming a very important city. After that, King Peter I of Aragon gave to the town the privilege of celebrating a weekly market (1202) and a fair (1211); both celebrations motivated a demographic and economic growth. During the 15th century, it was the second most important locality of the whole region. Various plague epidemics that hit the town caused the subsequent depopulation.

During the war against King John II of Castile, the population firstly positioned for the Generalitat. King John II gave the city to Joan Berenguer de Masdovelles shortly after. The economic and demographic recovery after the war was extremely slow.

L’Arboç suffered other disasters as a consequence of war conflicts. On the 10th of June 1808, the French troops looted and burnt down the town. On the 3rd of January, during the first Carlist War, it was looted again.

The documentary fonds from the Town Council of L’Arboç entered the Archive of the Crown of Aragon in 1940 together with other municipal, parochial and private documents. They were delivered by the Bibliographic and Documentary Recovery Service (Servicio de Recuperación Bibliográfica y Documental) when the period for the owners to ask for their archives collected in the Monastery of Pedralbes ended. It is composed by 179 parchments, 2 bundles and 26 books.