The UNESCO (United Nations Educational, Scientific and Cultural Organization) has designated 175 World Heritage Sites in all of the 15 sovereign countries (also called "state parties") of Southern Europe: Albania, Andorra, Bosnia and Herzegovina, Croatia, Greece, Italy, Malta, Montenegro, North Macedonia, Portugal, San Marino, Serbia, Slovenia, Spain, and Vatican City as well as one site in the British Overseas Territory of Gibraltar. While Turkey has territory in Southern Europe, they are not included here but in Western Asia, and Cyprus is also included in Western Asia. The top two countries by number of World Heritage Sites are located in this region: Italy with 58 sites and Spain with 49 sites (44 sites not including those on the Canary Islands, which are included in Africa). Seven sites are shared between several countries: Prehistoric Rock Art Sites in the Côa Valley and Siega Verde (Portugal and Spain), Rhaetian Railway in the Albula / Bernina Landscapes (Italy and Switzerland), Monte San Giorgio (Italy and Switzerland), Historic Centre of Rome, the Properties of the Holy See in that City Enjoying Extraterritorial Rights and San Paolo Fuori le Mura (Holy See and Italy), Pyrénées – Mont Perdu (France and Spain), Prehistoric Pile dwellings around the Alps (Austria, France, Germany, Italy, Slovenia and Switzerland) and Heritage of Mercury – Almadén and Idrija (Slovenia and Spain). The first sites from the region were inscribed in 1979 a year after the list's conception, and included six sites in the former Yugoslavia and one site in Italy. Each year, UNESCO's World Heritage Committee may inscribe new sites on the list, or delist sites that no longer meet the criteria. Selection is based on ten criteria: six for cultural heritage (i–vi) and four for natural heritage (vii–x). Some sites, designated "mixed sites," represent both cultural and natural heritage. In Southern Europe, there are 154 cultural, 16 natural, and 5 mixed sites. The World Heritage Committee may also specify that a site is endangered, citing "conditions which threaten the very characteristics for which a property was inscribed on the World Heritage List." One of the sites (Medieval Monuments in Kosovo) in Southern Europe is listed as endangered and four sites (Old City of Dubrovnik, Natural and Culturo-Historical Region of Kotor, Plitvice Lakes National Park and Butrint) were previously listed. Possible danger listing has been considered by UNESCO in a number of other cases. Legend Site; named after the World Heritage Committee's