This historical gathering of the three virtuous lamas is called Yuksom, which in Lepcha means the 'The Place where the Three monks met' as in Lepcha a lama is called a "Yukmun" and three is called "Som".
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Not much is known about Sikkim's ancient history, except that the original inhabitants were the Lepcha (or "Rong"), Limbu(Tsong) and Bhutias Sikkim also finds its mention on many Hindu texts as Indrakil or "Garden of Lord Indra."
Within South Asia, it is known by many local names: Sansorai (Assam); Daoduma (Cachar); lnruibuma (Kacha Naga); Vohbubum (Kuki); Simokpho (Lepcha); linisk (Bhutea); Gulu,Gundra, Gundlu, Salui gundra (Hindi); Gulu (Bengal); Kalada - male, Pured - female (Telugu); Ankadik - male, Kurung kadik - female (Tamil); Durwa (Ratnagiri); Karechakki (Kannada); Bala watuwa (Sri Lanka).
In 2008, Sushila Subba, Indu Sarki, Pasang Tamang, Kushmita Biswakarma (Violin) and Urbanus Lepcha (Viola) participated in the Music Experiment.
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In 2007, Kushmita Biswakarma, Jokhim Lepcha, Jennifer Khawas (Violin) and Ajay Darjee (Cello) represented the school.
The Lepcha people are composed of four main distinct communities: the Renjóngmú of Sikkim; the Támsángmú of Kalimpong, Kurseong, and Mirik; the ʔilámmú of Ilam District, Nepal; and the Promú of Samtse and Chukha in southwestern Bhutan.
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The Lepcha people themselves do not have any tradition of migration, and hence they conclude that they are aboriginal to the region, currently falling under the state of Sikkim, Darjeeling District of West Bengal, eastern Nepal and the southwestern parts of Bhutan.
Eventually after the establishment of Namgyal dynasty in Sikkim and under the Lho-Mehn-Tsong Tsum, a treaty between the Bhutia, Lepcha and Limbu people of the Sikkim area, Limbuwan lost the area between Kunchenjunga range (present day eastern border of Nepal) and Teesta River to the Bhutia Kings of Sikkim.
On this occasion, the Lepchas and Magarsof the area, who had accompanied Phunshog to Yuksom Norbugang for the coronation ceremony, had presented a large number of treasures to the lamas, particularly to Lhatsun Chempo.
In 1954 he spent five months in Leiden identifying the collection of Lepcha manuscripts at the National Museum of Ethnology, where he had already made a list of the titles of Tibetan xylographs and manuscripts during a seven month stay in 1953.