Assumption was built in 1760, and another church called Annunciation of Our Lady was built in Bhaktapur. After the unification of Nepal by Prithvi Narayan Shah into a Hindu kingdom, the priests were asked to leave for fear they were British spies.
In 1769 the priests and many Nepalese Christians left for India and settled in Chuhari, Northern Bihar, where they have remained. One Catholic priest did remain until his death in 1810.
THE CHANGE IN 1951
Until 1951 there were no known Christian activities in Nepal.
In 1951 and later Protestant Christians came to Nepal primarily through the Nepalese who were living outside of Nepal during and prior to the Rana Regime.
Nepali Christians living in India came in, along with some western missionaries. United Mission to Nepal, International Nepal Fellowship and others are a few earliest western mission agencies that came in and brought Christianity.
According to the government data, Christian followers in Nepal accounts for about 1.4%* of the population.
TREMENDOUS GROWTH OF THE CHURCH
Until 1990, most of the church groups in Nepal were united with few exceptions like Assembly of God and Church of Christ. At that time the growth of the number of Christians was relatively small.
In 1990 the democratic changes brought relative more freedom to practice one's faith. This freedom contributed towards a proliferation of various denominations and groups.
Church as a whole in Nepal is an indigenous phenomena with no direct involvement of foreign missionaries. Nepalese themselves took upon the challenge of sharing the gospel and churches came into existence.
NEPALI CHARACTER
Although the church leadership are Nepali in nature, the Nepali Christian leaders have adopted some of the names and practices from foreign churches.
Doctrinally, Nepali church is very much like the New Testament Church and there is hardly any theological debate taking place in Nepal. Until now Christianity had been growing in Nepal.
By and large, the church in Nepal continues to enjoy relative freedom and Nepali population is very tolerant of their presence. Christianity is still considered a foreign religion by the majority of Hindus and Buddhists. If any family member becomes Christian, he or she is sure to face severe opposition from the family and even be completely ostracized by them.
Sources: Wikipedia