 Nanotechnology has the potential to revolutionize the practice of built heritage conservation by providing more effective solutions than traditional methods. Nanoparticles have unique properties that make them ideal for use in conservation treatments such as cleaning, consolidation, and protection. These particles are small enough to penetrate into cracks and crevices, allowing for better access to difficult to reach areas. Additionally, they are able to adhere strongly to surfaces, making them ideal for sealing and protective coatings. Furthermore, nanoparticles can be used to detect and monitor changes in the environment, which allows for more accurate monitoring of the condition of cultural heritage sites. This article was authored by Jorge Otero, Giovanni Borsoi, and Luis Monasterio Guillo.