sentence: several religious movements contributed to the historical development of religion at angkor : indigenous religious cults , including those centered on worship of the ancestors and of the lingam ; a royal cult of personality , identifying the king with the deity , characteristic not only of angkor , but of other indic civilizations in southeast asia , such as champa and java ; hinduism , especially shaivism , the form of hinduism focussed on the worship of shiva and the lingam as the symbol of shiva , but also vaishnavism , the form of hinduism focussed on the worship of vishnu ; buddhism , in both its mahayana and theravada varieties .