Historical stories set in a mythical and fantastical past were popular. Furthermore, political and historical realities are combined with the mythical and magical Latin American world. Paintings of mythical beasts exist in Goguryeo king tombs today. Mictlan had nine layers which were inhabited by different deities and mythical beings. Many of the legends surrounding mythical creatures are also incorporated in the books. An episode also included a story about mythical satyr creatures. Ferns figure in folklore, for example in legends about mythical flowers or seeds. Still others regard the battle as mythical or purely legendary. Stories presented are usually mythical and morality tales. The Sangam literature also records legends about mythical Chola kings. The underworld was part of a mythical world tree. They could depict bowls and tripods, griffins, spinxes, and especially mythical figures and deities. Public statuary was widespread, depicting mythical and heroic figures. Halloween imagery includes themes of death, evil, and mythical monsters. One function of mythical animals in the Middle Ages was allegory.