The Hekhalot literature (sometimes transliterated Heichalot) from the Hebrew word for "Palaces", relating to visions of ascents into heavenly palaces. The genre overlaps with Merkabah or "Chariot" literature, concerning Ezekiel's chariot, so the two are sometimes referred to together as "Books of the Palaces and the Chariot" (ספרות ההיכלות והמרכבה). The Hekhalot literature is a genre of Jewish esoteric and revelatory texts produced some time between late antiquity – some believe from Talmudic times or earlier – to the early Middle Ages.