The Jesús María Jesuit National Museum in Argentina holds a documentary and material collection linked to the Jesuit presence in the country. Its relevance to restoration lies in the need to apply specific criteria for paper supports and historical objects, where intervention must document the prior state and avoid erasing historical information. The institution serves as a case study on how preventive conservation and curative restoration are integrated in the management of heritage archives, prioritizing physical stability and document readability for transmission to future generations.