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Christianity

The first Christians documented to have reached Tibet were the Nestorians, of whom various remains and inscriptions have been found in Tibet. They were also present at the imperial camp of Möngke Khan at Shira Ordo, where they debated in 1256 with Karma Pakshi (1204/6-83), head of the Karma Kagyu order. Desideri, who reached Lhasa in 1716, encountered Armenian and Russian merchants.

Roman Catholic Jesuits and Capuchins arrived from Europe in the 17th and 18th centuries. Portuguese missionaries Jesuit Father António de Andrade and Brother Manuel Marques first reached the kingdom of Gelu in western Tibet in 1624 and was welcomed by the royal family who allowed them to build a church later on. By 1627, there were about a hundred local converts in the Guge kingdom. Later on, Christianity was introduced to Rudok, Ladakh and Tsang and was welcomed by the ruler of the Tsang kingdom, where Andrade and his fellows established a Jesuit outpost at Shigatse in 1626.

In 1661 another Jesuit, Johann Grueber, crossed Tibet from Sining to Lhasa (where he spent a month), before heading on to Nepal. He was followed by others who actually built a church in Lhasa. These included the Jesuit Father Ippolito Desideri, 1716–1721, who gained a deep knowledge of Tibetan culture, language and Buddhism, and various Capuchins in 1707–1711, 1716–1733 and 1741–1745, Christianity was used by some Tibetan monarchs and their courts and the Karmapa sect lamas to counterbalance the influence of the Gelugpa sect in the 17th century until in 1745 when all the missionaries were expelled at the lama's insistence.

In 1877, the Protestant James Cameron from the China Inland Mission walked from Chongqing to Batang in Garzê Tibetan Autonomous Prefecture, Sichuan province, and "brought the Gospel to the Tibetan people." Beginning in the 20th century, in Dêqên Tibetan Autonomous Prefecture in Yunnan, a large number of Lisu people and some Yi and Nu people converted to Christianity. Famous earlier missionaries include James O. Fraser, Alfred James Broomhall and Isobel Kuhn of the China Inland Mission, among others who were active in this area.

Proselytising has been illegal in China since 1949. But as of 2013, many Christian missionaries were reported to be active in Tibet with the tacit approval of Chinese authorities, who view the missionaries as a counterforce to Tibetan Buddhism or as a boon to the local economy.