Synthesizing historical, legal, and technical frameworks, this comprehensive volume establishes risk management and preventive conservation as essential methodologies for safeguarding cultural heritage within confined environments such as museums, libraries, and archives. Rather than relying on traditional post-damage restoration, the authors advocate for proactive risk mitigation strategies designed to protect historical, artistic, and archival artifacts over extended time horizons. The study traces the evolution of Italian and international conservation regulations—from Renaissance papal edicts to contemporary legal frameworks—and examines specific physical, chemical, biological, and anthropogenic hazards affecting cultural assets. Through detailed case studies, including environmental monitoring at the Casanatense Library in Rome and the Ravenna Art Museum, the work demonstrates the practical application of the CCI-ICCROM-RCE risk assessment methodology. Ultimately, the volume underscores that integrated risk management is crucial for preserving collective memory and ensuring long-term heritage sustainability