Superficially Indochina is Buddhist but there is more to it than that. Tradition plays a role in Laotian life and the spirits play a role, especially amongst the small ethnic tribes. In total, there are around 50 such groups. Buddhism in the region dates back to the 8th Century and over succeeding centuries it spread. Laos kings were patrons of the religion which was adopted as the national religion in the 16th Century.