... 2001, the Convention on the Protection of the Underwater Cultural Heritage was adopted at a meeting in Paris of the General Conference of the United Nations Educational, Scientific and Cultural Organization. It's designed to strengthen protection of, as stated in Art. 1,
all traces of human existence having a cultural, historical or archaeological character which have been partially or totally under water, periodically or continuously, for at least 100 years,including buildings, prehistoric objects, and sunken subs like that at right. The UNESCO treaty will not enter into force until 5 more countries join the 15 states parties so far: Bulgaria, Croatia, Ecuador, Lebanon, Libya, Lithuania, Mexico, Nigeria, Panama, Paraguay, Portugal, Romania, St. Lucia, Spain, and Ukraine.