FIGURE 3: Satellite location of the National Archive of the Republic of Cuba (NARC) in the city of Havana (A), aerial view showing its proximity to the sea, as well as the avenues and the vegetation that surround the building (B), photo (C) and schematic representation (D) of natural ventilation system openings location in the repositories as well as the microbiological sampling points (E) in each repository analyzed (a, b). At position (a) or north side of the building are repositories R-8, R-20, R-28, and at position (b) or south part are repositories R-4, R-14, R-24.