Historically, Javanese follow a syncretic form of Hinduism, Buddhism and Kejawen ( which is animistic) as they were united under Hindu/Buddhist kingdoms for centuries. Starting from the 15th century, Islam and Christianity came to Java and slowly spread. Islam spread quickly under new Islamic monarchs. The spread of Christianity was supervised by colonial powers. All of the new religions were absorbed and interpreted by the Javanese according to the Javanese traditional values.