The List of World Heritage in Danger is compiled by the United Nations Educational, Scientific and Cultural Organization (UNESCO) through the World Heritage Committee according to Article 11.4 of the World Heritage Convention, which was established in 1972 to designate and manage World Heritage Sites. Entries in the list are threatened World Heritage Sites for the conservation of which major operations are required and for which "assistance has been requested". The list is intended to increase international awareness of the threats and to encourage counteractive measures. Threats to a site can be either proven imminent threats or potential dangers that could have adverse effects on a site. In the case of natural sites, ascertained dangers include the serious decline in the population of an endangered or other valuable species or the deterioration of natural beauty or scientific value of a property caused by human activities such as logging, pollution, settlement, mining, agriculture and major public works. Ascertained dangers for cultural properties include serious deterioration of materials, structure, ornaments or architectural coherence and the loss of historical authenticity or cultural significance. Potential dangers for both cultural and natural sites include development projects, armed conflicts, insufficient management systems or changes in the legal protective status of the properties. In the case of cultural sites, gradual changes due to geology, climate or environment can also be potential dangers. Before a property is inscribed on the List of World Heritage in Danger, its condition is assessed and a potential programme for corrective measures is developed in cooperation with the State Party involved. The final decision about inscription is made by the committee. Financial support from the World Heritage Fund may be allocated by the committee for listed properties. The state of conservation is reviewed on a yearly basis, after which the committee may request additional measures, delete the property from the list if the threats have ceased or consider deletion from both the List of World Heritage in Danger and the World Heritage List. Of the three former UNESCO World Heritage Sites, the Dresden Elbe Valley and the Liverpool Maritime Mercantile City were delisted after placement on the List of World Heritage in Danger while the Arabian Oryx Sanctuary was directly delisted. Some sites have been designated as World Heritage Sites and World Heritage in Danger in the same year, such as the Church of the Nativity, traditionally considered to be the birthplace of