Abstract
The Carlos G. García Vélez (1867–1963) collection, held at the José Martí National Library of Cuba, comprises documents of great historical value associated with a general in the Cuban Liberation Army. This study describes and evaluates the conservation practices applied to this collection, guided by the principle of minimal intervention and in compliance with Resolution 201/2020 of Cuba’s Ministry of Science, Technology, and Environment (CITMA, in Spanish). Methodologically, a qualitative assessment of the state of preservation was conducted, considering chemical, physical, and biological deterioration factors and their extent. Based on this analysis, preventive and interventional conservation measures were implemented to stabilize the materials. The results show a significant improvement in the physical condition of the documents, enabling controlled handling and access for research. The study provides practical experience in managing heritage collections in resource-constrained contexts, contributing to the systematization of best practices in document conservation within memory institutions.