Hungarian mythology includes the myths, legends, folk tales, fairy tales and gods of the Hungarians, also known as the Magyarok. Much of Magyar mythology is believed to be lost. However, in the last hundred years scholars of the history of Hungarian culture have tried eagerly to recover a significant amount of Hungarian mythology. The most important sources are: Folklore, as many mythical persons remain in folk tales, folk songs, legends, also special traditions linked to special dates, unknown elsewhere Medieval chronicles such as codices and manuscripts Secondary sources such as accounts about Hungarians by other authors (mostly before 850 AD) Archaeological research Amongst the modern religions, Hungarian mythology is closest to the cosmology of Uralic peoples. In Hungarian myth, the world is divided into three spheres: the first is the Upper World (Felső világ), the home of the gods; the second is the Middle World (Középső világ) or world we know, and finally the underworld (Alsó világ). In the center of the world stands a tall tree: the World Tree / Tree of Life (Világfa/Életfa). Its foliage is the Upper World, and the Turul bird dwells on top of it. The Middle World is located at its trunk and the underworld is around its roots. In some stories, the tree has fruit: the golden apples. In Hinduism and Buddhism, there are very similar beliefs in the Trailokya and Kalpavriksha. The gods live in the Upper World. Gods have the same rank, although the most important figure of them is Isten (Hungarian for "God"). He controls the world, shapes the fate of humans, observes the Middle World from the sky, and sometimes gives warning by lightning (mennykő). Isten created the world with the help of Ördög ("the devil" representing Evil). Other gods include: Istenanya ("Mother God"), also known as Boldogasszony ("Blessed Lady", literally meaning "happy/merry woman"; later identified with Catholicism's Virgin Mary), and Hadúr ("warlord" or "commander") of the fire, and later war god.