The natives of the Indonesian archipelago originally practised indigenous animism and dynamism, beliefs that are common to Austronesian people. They worshipped and revered ancestral spirit and believed that supernatural spirits (''hyang'') might inhabit certain places such as large trees, stones, forests, mountains, or sacred sites. Examples of Indonesian native belief systems include the Sundanese Sunda Wiwitan, Dayak's Kaharingan, and the Javanese Kejawèn. They have had a significant impact on how other faiths are practised, evidenced by a large proportion of people—such as the Javanese abangan, Balinese Hindus, and Dayak Christians—practising a less orthodox, syncretic form of their religion.