The earliest established religion was Hinduism during the Cham Hindu Kingdom era. Later, Buddhism, Confucianism and Taoism spread. Today, these religions are grouped into the same religion known as the "triple religion" or Tam Giao, which has many followers. Later religions in Vietnam include Christianity and Islam. New religious movements include Hoa Hao Buddhism and Cao Dai. Hinduism is still practised by a small Cham minority who live mainly in central Vietnam.