Underwater Cultural Heritage
How international law protects shipwrecks, submerged ruins, and other cultural artifacts beneath the sea.
Protecting the Past Beneath the Waves
There are an estimated three million shipwrecks on the ocean floor, along with submerged cities, ports, and ancient structures. These represent irreplaceable records of human history. The 2001 UNESCO Convention on the Protection of the Underwater Cultural Heritage is the primary international instrument. It defines underwater cultural heritage as all traces of human existence having a cultural, historical, or archaeological character that have been partially or totally under water for at least 100 years.
The Convention establishes that underwater cultural heritage shall not be commercially exploited. In situ preservation, leaving artifacts where they are, is the preferred option. Any recovery must be done in accordance with professional archaeological standards. Importantly, the Convention applies the law of salvage only to the extent compatible with cultural heritage protection, effectively overriding commercial salvage claims for archaeologically significant wrecks.