The Municipal Charter of Cardona is preserved in the Historic Archives, one of the oldest and, taking into account its content, one of the most legally significant in Europe, with an extensive depository of rights, privileges and rules of coexistence. The Municipal Charter was granted by count Borrell II on 23 April in the year 986. The Charter incorporates and confirms the clauses of a first Charter awarded by his grandfather, count Wilfred the Hairy, around 880.
Borrell II guaranteed the safety of the people who were to inhabit ‚Äúthe castle called Cardona and its outlying village... and to their descendants and posterity (...) forevermore‚ÄĚ. He conferred economic benefits such as the prized ‚Äúdret d‚ÄôAimines‚ÄĚ, still in force today, consisting of the right to take salt from the salt warehouse every Thursday. The Charter establishes a social coexistence order and a legal administration free from arbitrariness.