Question: Which body made the Persepolis citadel a World Heritage Site in 1979?
About the article "Iran", section "Provinces and cities".

Candidate passages:
Persepolis (Old Persian: "Pārśa", New Persian: پرسپولیس) literary meaning "city of Persians", was the ceremonial capital of the Achaemenid Empire ().
Persepolis is situated northeast of city of Shiraz in the Fars Province in Iran.
The earliest remains of Persepolis date from around 515 BC.
It exemplifies the Achaemenid style of architecture.
UNESCO declared the citadel of Persepolis a World Heritage Site in 1979. 
The Citadel of Damascus (: "Qala'at Dimashq") is a large medieval fortified palace and citadel in Damascus, Syria.
It is part of the Ancient City of Damascus, which was listed as a UNESCO World Heritage Site in 1979.
The location of the current citadel was first fortified in 1076 by the Turkman warlord Atsiz bin Uvak, although it is possible but not proven that a citadel stood on this place in the Hellenistic and Roman periods.
After the assassination of Atsiz bin Uvak, the project was finished by the Seljuq ruler Tutush I.
The emirs of the subsequent Burid and Zengid dynasties carried out modifications and added new structures to it.
During this period, the citadel and the city were besieged several times by Crusader and Muslim armies.
In 1174, the citadel was captured by Saladin, the Ayyubid sultan of Egypt, who made it his residence and had the defences and residential buildings modified.
Saladin's brother Al-Adil rebuilt the citadel completely between 1203 and 1216 in response to the development of the counterweight trebuchet.
After his death, power struggles broke out between the other Ayyubid princes and although Damascus switched hands several times, the citadel was taken by force only once, in 1239.
The citadel remained in Ayyubid hands until the Mongols under their general Kitbuqa captured Damascus in 1260, thereby ending Ayyubid rule in Syria.
After an unsuccessful revolt broke out in the citadel, the Mongols had most of it dismantled.
After the defeat of the Mongols in 1260 by the Mamluks, who had succeeded the Ayyubids as rulers of Egypt, Damascus came under Mamluk rule.
Except for brief periods in 1300 and 1401, when the Mongols conquered Damascus, the Mamluks controlled the citadel until 1516.
In that year, Syria fell into the hands of the Ottoman Empire.
Damascus surrendered without a fight and from the 17th century onward the citadel functioned as barracks for the Jannisaries—Ottoman infantry units.
The citadel started to fall into disrepair in the 19th century and its last military use was in 1925, when French soldiers shelled the old city from the citadel in response to the Great Syrian Revolt against the French Mandate of Syria.
The citadel continued to serve as a barracks and prison until 1986, when excavations and restorations started.
As of 2011, excavation and restoration efforts are still ongoing.
The citadel is located in the northwest corner of the city walls, between the Bab al-Faradis and the Bab al-Jabiyah.
The citadel consists of a more or less rectangular curtain wall enclosing an area of .
The walls were originally protected by 14 massive towers, but today only 12 remain.
The citadel has gates on its northern, western and eastern flanks.
The current citadel dates primarily to the Ayyubid period while incorporating parts of the older Seljuq fortress.
Extensive repairs in response to sieges and earthquakes were carried out in the Mamluk and Ottoman periods. 
Iran is divided into thirty one provinces ("ostān"), each governed by an appointed governor (استاندار, ostāndār).
The provinces are divided into counties ("shahrestān"), and subdivided into districts ("bakhsh") and sub-districts ("dehestān").
Iran has one of the highest urban growth rates in the world.
From 1950 to 2002, the urban proportion of the population increased from 27% to 60%.
The United Nations predicts that by 2030, 80% of the population will be urban.
Most internal migrants have settled near the cities of Tehran, Isfahan, Ahvaz, and Qom.
The listed populations are from the 2006/07 (1385 AP) census.
Tehran, with a population of 7,705,036, is the largest city in Iran and is the capital.
Tehran, like many big cities, suffers from severe air pollution.
It is the hub of the country's communication and transport network.
Mashhad, with a population of 2,410,800, is the second largest Iranian city and the centre of the Razavi Khorasan Province.
Mashhad is one of the holiest Shia cities in the world as it is the site of the Imam Reza shrine.
It is the centre of tourism in Iran, and between 15 and 20 million pilgrims go to the Imam Reza's shrine every year.
Another major Iranian city is Isfahan (population 1,583,609), which is the capital of Isfahan Province.
The Naqsh-e Jahan Square in Isfahan has been designated by UNESCO as a World Heritage Site.
The city contains a wide variety of Islamic architectural sites ranging from the 11th to the 19th century.
The growth of the suburban area around the city has turned Isfahan into Iran's second most populous metropolitan area (3,430,353).
The fourth major city of Iran is Tabriz (population 1,378,935), the capital of the East Azerbaijan Province.
It is also the second industrial city of Iran after Tehran.
Tabriz had been the second largest city in Iran until the late 1960s and one of its former capitals and residence of the crown prince under the Qajar dynasty.
The city has proven extremely influential in the country’s recent history.
The fifth major city is Karaj (population 1,377,450), located in Alborz Province and situated 20 km west of Tehran, at the foot of the Alborz mountains; however, the city is increasingly becoming an extension of metropolitan Tehran.
The sixth major Iranian city is Shiraz (population 1,214,808); it is the capital of Fars Province.
The Elamite civilization to the west greatly influenced the area, which soon came to be known as Persis.
The ancient Persians were present in the region from about the 9th century BCE, and became rulers of a large empire under the Achaemenid dynasty in the 6th century BCE.
The ruins of Persepolis and Pasargadae, two of the four capitals of the Achaemenid Empire, are located in or near Shiraz.
Persepolis was the ceremonial capital of the Achaemenid Empire and is situated northeast of modern Shiraz.
UNESCO declared the citadel of Persepolis a World Heritage Site in 1979.
The Ancient City of Damascus, including the citadel, was listed as a UNESCO World Heritage Site in 1979.
Since 1986 restoration works have been carried out by various Syrian and foreign missions with the aim of opening the citadel to the public.
Until 1999, the restorations were carried out by the Syrian Directorate-General of Antiquities and Museums (DGAM).
In 1999 a joint French-Syrian mission was initiated under the supervision of the DGAM and the Institut français du Proche-Orient (IFPO).
Between 2000 and 2006, this mission carried out extensive archaeological and art-historical research in the citadel, as well as further restoration works.
In celebration of these restorations, a ceremony was held on 1 July 2006 which was attended by Syrian President Bashar al-Assad.
In 2004 an agreement was signed between the DGAM and the Italian General Direction for Development Cooperation for a joint mission to renovate and reorganize the citadel and the National Museum of Damascus.
This mission started working in the citadel in 2007.
Much attention will be given to the reinforcement of damaged or structurally weak parts in the architecture.
It is expected by the Syrian–Italian mission that, once renovations are finished, the citadel will be used for cultural and social events and activities. 
The Flag Tower of Hanoi () is a tower in Hanoi, Vietnam, which is one of the symbols of the city and part of the Hanoi Citadel, a World Heritage Site.
Its height is 33.4 m (41 m with the flag).