Baetylus (also Baetyl, Bethel, or Betyl, from Semitic bet el "house of god"; compare Bethel, Beit El) are sacred stones that were supposedly endowed with life, or gave access to a deity. According to ancient sources, at least some of these objects of worship were meteorites, which were dedicated to the gods or revered as symbols of the gods themselves. Other accounts suggest that contact with them could give access to epiphanic experiences of the deity. The baetyl has been described by Wendy Doniger as "the parent form for altars and iconic statuary". In general the baetyl was believed to have something inherent in its own nature that made it sacred, rather than becoming sacred by human intervention, such as carving it into a . Some baetyls were left in their natural state, but others were worked on by sculptors. The exact definition of a baetyl, as opposed to other types of sacred stones, "cult stones" and so on, is rather vague both in ancient and modern sources. In some contexts, especially relating to Nabataean sites like Petra, the term is commonly used for shaped and carved stelae. They had a role in most regions of the ancient Near East and Greek and Roman religion, as well as other cultures. With various other sites around the Mediterranean, they were a feature of the Neolithic temple site of Tas-Silġ and other sites on Malta and Gozo. The Hittites worshiped sacred stones called Huwasi stones. In the Hebrew Bible, Bethel (meaning "House of God"), is where Jacob had his vision of Jacob's ladder. Coming upon the place at nightfall, the Book of Genesis tells the reader that he laid his head on a stone, and had the vision while sleeping, then: When Jacob awoke from his sleep, he thought, "Surely the Lord is in this place, and I was not aware of it." He was afraid and said, "How awesome is this place! This is none other than the house of God; this is the gate of heaven." Early the next morning Jacob took the stone he had placed under his head and set it up as a pillar and poured oil on top of it.