Objects and sites decay unless deliberate care intervenes. Preservation is the effort to maintain historical materials and places in a stable condition, protecting them from physical deterioration, environmental damage, and inappropriate alteration.

Techniques range from climate-controlled storage and chemical stabilization to legal protection of buildings and landscapes. Conservators assess materials and apply reversible treatments where possible. Preservation philosophy debates how much intervention is appropriate and whether later additions form part of a site’s history.

Successful preservation enables future research and public access. It requires ongoing resources and institutional commitment. Conflicts arise when preservation goals clash with development pressures or when stakeholders disagree about which past should be preserved. The practice is both technical and cultural.

• Maintenance of historical objects and sites
• Protects against decay and inappropriate change
• Involves technical and legal measures
• Balances access, authenticity, and resources