Boudhanath

Boudha(, also called the "Khāsa Chaitya", Nepal Bhasa "Khāsti", Prachalit Nepal alphabet : 𑐏𑐵𑐳𑑂𑐟𑐶 𑐩𑐵𑐴𑐵𑐔𑐿𑐟𑑂𑐫, Standard Tibetan "Jarung Khashor", ) is a stupa in Kathmandu, Nepal. Located about from the center and northeastern outskirts of Kathmandu, its massive mandala makes it one of the largest spherical stupas in Nepal and the world.
The influx of large populations of refugees from Tibet has seen the construction of over 50 gompas (Tibetan convent) around Boudha. As of 1979, Boudha Stupa is a UNESCO World Heritage Site. Along with Swayambhu, it is one of the most popular tourist sites in the Kathmandu area.
The stupa is on the ancient trade route from Tibet which enters the Kathmandu Valley by the village of Sankhu in the northeast corner and continues to the ancient and smaller stupa of Chā-bahī named Charumati Stupa (often called "Little Boudhanath"). It then turns directly south, heading over the Bagmati River to Lalitpur, bypassing the main city of Kathmandu (which was built later). Tibetan merchants have rested and offered prayers at Boudha Stupa for many centuries. When refugees entered Nepal from Tibet in the 1950s, many decided to live around Boudhanath. The stupa is said to entomb the remains of Kassapa Buddha.
Mythology.
Legend of the construction of the stupa according to Newar Buddhist mythology.
According to the history of Nepal, where the Narayanhiti Palace currently stands, once stood the palace of King Vikramaditya (of the Licchavi kingdom). King Vikramaditya instructed that a dhunge dhara should be built in the southern part of the palace courtyard. When the new dhunge dhara produced no water, the king consulted his astrologers, who suggested that what was needed was a human sacrifice of a male candidate having "Battis-Lakshanas", or "thirty-two perfections". Only the king himself and his two princes were suitable candidates, so the king decided to sacrifice himself to bring water to the dhunge dhara. According to local mythology, during the sacrifice (performed, at the king's order by one of his sons), the king's head flew off, landing at the nearby Sankhu Bajrayogini Temple.
The prince, with a regretful heart, decided to go to the top of Bajrayogini and cast off a chicken, determined to construct a stupa where it landed. The hen landed in the place where Boudhanath Stupa currently stands. Because the people at that time were managing to survive the drought by collecting droplets of dew, the place was named Khāsti, a combination of the Nepal Bhasa words for dew ("khas") and drops ("ti").
Later His Majesty's Government of Nepal renamed the place from Khasti to Boudhanath to better reflect the Hinduism of that Hindu nation.
Legend of the construction of the stupa according to Tibetan Buddhist mythology.
The village that surrounds the great Kāśyapa stupa is generally known by the name of Bauddha. ...which in Tibetan is called Yambu Chorten Chenpo (Tibetan: ཡམ་བུའི་མཆོད་རྟེན་ཆེན་པོ། Wylie: "yam bu'i mchod rten chenpo"). Jya Lung Khashor Chorten Chenpo, literally which may be translated as "Chorten of Hens skin-rope breach promise" The stupa has an interesting history of its own which explains this strange name. 
It is said in this story that Kāśyapa was a Buddha that lived a long time before Śākyamuni Buḍḍha. 
After Kāśyapa Buddha's demise, a certain old woman-Ma-jha-zi-ma (Tibetan: མ་བྱ་རྫི་མ། Wyle: "ma bya rzi ma")who owned hens farm, with her four sons, interred this great sage's remains at the spot over which the great mound now stands, the latter having been built by the woman herself. Before starting on the work of construction, she petitioned the King of the time to grand a land size of a piece of skin and obtained permission to "proceed with" building a tower. the king was surprised how she going to build it on such small size of land, and gave her both land and permission. She then carefully cut the skin and made skin-rope "(lung)" and circulate the area. Which become the size of present area of Bouddhanath. 
By the time that, as a result of great sacrifices on the part of the woman and her four sons, the groundwork of the structure had been finished, those who saw it were astonished at the greatness of the scale on which it was undertaken. Especially was this the case with the high officials of the country, who all said that if such a poor old dame were allowed to complete building such a stupendous tower, they themselves would have to dedicate a temple as great as a mountain, and so they decided to ask the King to disallow the further progress of the work. When the King was approached on the matter his Majesty replied: "I have finished giving the order to the woman to proceed with the work. Kings must not eat their words, and I cannot undo my orders now" which is known as "(Kha-Shor)," thus, the name came as Jya Lung Khashor. So the tower was allowed to be finished, and hence its unique name, "Jya Lung Kha-shor Chorten Chenpo."
Tamang an ethnically tibetic group in Nepal, have been living in Boudha for many centuries and still own lands surrounding the area of Boudhanath stupa. Chiniya Lama and the daughter of Jung Bahadur Rana (through his Tamang wife who was born in Boudha) six times great grandchildren still manages the preservation of the stupa.
History.
The "Gopālarājavaṃśāvalī" says Boudhanath was founded by the Nepalese Licchavi king Śivadeva (c. 590–604 CE); though other Nepalese chronicles date it to the reign of King Mānadeva (464–505 CE). Tibetan sources claim a mound on the site was excavated in the late 15th or early 16th century and the bones of King Aṃshuvarmā 605–621 were discovered there.
The earliest historical references to the Khaasti Chaitya are found in the Chronicles of the Newars. First, Khaasti is mentioned as one of the four stupas found by the Licchavi king Vrisadeva (ca.AD 400) or Vikramjit. Second, the Newars legend of the stupa's origin attributes it to king Dharmadeva's son, Manadeva as atonement for his unwitting parricide Manadeva was the great Licchavi king, military conqueror and the patron of the arts who reigned ca.AD 464–505. Manadeva is also linked with the Swayambhu Chaitya of Gum Bahal. Third, another great Licchhavi king Shivadeva (AD 590–604) is associated with Boudha by an inscription; he may have restored the chaitya.
According to the history of Nepal, the palace of King Vikramjit (Licchavi King) once stood where the Naranhiti Palace currently stands. King Vikramjit instructed that a Hiti should be built in the southern part of palace courtyard, but there was no sign of water from the Hiti, for which the king consulted Astrologers. Astrologers suggested that a sacrifice with a male candidate having ‘swee-nita lachhyan'(स्वीनिता लछ्यन), or thirty-two perfections should be performed. Only the king himself and his two princes were suitable candidates. So, the king decided to sacrifice himself and ordered one of his sons to sacrifice him so that sign of water could be seen at the Hiti. The king told his son that a man will be sleeping by covering his face and body, and to sacrifice him without looking at his face. After the son did so, he realised he had killed his own father. With regret and guilty he consulted with priests for way to salvation. The priests suggested him to fly a ‘bwo-khaa'(ब्वःखा) a flying hen from the top of Mhaasu Khwaa Maju(म्हासु ख्वा: माजु). The hen landed in the place where the chaitya is currently standing. An Ajimaa was already located at that place before the chaitya construction started. During the time of its construction, the place was struck with a drought and the people managed to abate the scarcity of water by collecting the droplets of dew. Dew is called ‘Khasu'(खसु) and droplets are called ‘Ti'(ति).
Historians suggest that the traditional knowledge to harvest dew droplets have been lost with time. The places that end with ‘Ti'(ति) have similar history, such as Chalati(चलति), Kusunti(कुसिन्ति), and so on. Khaasti Ajimaa(खास्ति अजिमा) is one of the important Ajima of Kathmandu. The Newa tradition consider Ajima as super power. These female energies protect the nation. The tradition of Kumari relates to a place called ‘Kumari-gaal’ which is south to Khaasti.
However, the emperor Trisong Detsen (r. 755 to 797) of the Tibetan Empire is also traditionally associated with the construction of the Boudhanath Stupa. The Yolmo Shakya Zangpo from Helambu resurrected Boudhanath. Princess of Nepal Bhrikuti married the King of Tibet Songtsen Gampo. His other Chinese wife and Bhrikuti are credited for introduction and spread of Buddhism in Tibet. Along Songtsen Gampo was Trisong Detsen, first Dharma King under him. While Buddhism was spreading in Tibet, and Tibet-Nepal trade relations were being stronger, a widow Tibetan woman travelled from Lhasa to visit Khaasti. She brought her four sons and they were fascinated by witnessing how Newa people constructed chaitya, a meta-symbolic construction with distinct levels of suggestion, sagacity and profoundness. The woman's name was Jyajhima, who took shade for many days in Khaasti. Impressed by the hospitality of Newars, she and her sons went back to Lhasa and told people stories about her experience in Nepal. She is notable as in those times, only traders and specially men were ones traveling Nepal-Tibet and back. She was fascinated by Khaasti, when she heard stories of Bhrikuti spread in Lhasa. Being a widow woman she had to ask permission from the king to visit Khaasti.
Jyajhima, a hen rearer woman is noted down by the local Newars of those times because of her attraction to the pilgrimage. It is said that she spend many days with her four sons in the premises of Khaasti before going back to Lhasa.
2015 Earthquake.
The April 2015 Nepal earthquake badly damaged Boudhanath Stupa, severely cracking the spire. As a result, the whole structure above the dome, and the religious relics it contained had to be removed, which was completed by the end of October 2015. The reconstruction began on 3 November 2015 with the ritual placement of a new central pole or "life tree" for the stupa at the top of the dome.
The stupa was reopened on 22 November 2016. The renovation and reconstruction was organised by the Boudhanath Area Development Committee (BADC). The repairs were funded entirely by private donations from Buddhist groups and volunteers. According to the BADC, it cost $2.1 million dollars and more than 30kg of gold. The repaired building was officially inaugurated by Prime Minister Pushpa Kamal Dahal. However, the Nepalese government was criticised for its slow pace in reconstructing quake-damaged heritage structures such as temples, with many left unrepaired.