Slavic mythology is the
mythological aspect of the
polytheistic religion that was practised by the
Slavs prior to Christianisation.
The religion possesses numerous common traits with other religions descended from the Proto-Indo-European religion.
Unlike Greek or Egyptian mythology, there are no first-hand records for the study of Slavic mythology. Despite some controversial theories (for instance, the Book of Veles), it cannot be proven that the Slavs had any sort of writing system prior to Christianisation; therefore, all their original religious beliefs and traditions were likely passed down orally over generations, and potentially forgotten over the centuries following the arrival of Christianity. Prior to that, sparse records of Slavic religion were mostly written by non-Slavic Christian missionaries who were disinterested in accurately portraying pagan beliefs. Archaeological remains of old Slavic idols and shrines have been found, though little can be yielded from them without proper knowledge of their contexts, other than confirming existing historical records. Fragments of old mythological beliefs and pagan festivals survive up to this day in folk customs, songs, and stories of all the Slavic nations.
There are no known written accounts of Slavic mythology predating the fragmentation of the Proto-Slavic people into Western, Eastern, and Southern Slavs, with the possible exception of a short note in Herodotus’ Histories, mentioning a tribe of Neuri in the far north, whose men, Herodotus claims, transform themselves into wolves for several days each year. Some researchers have interpreted this through the Slavic folk belief in werewolves, whilst others believe that Herodotus actually referred to ancient Slavic carnival festivals, when groups of young men roamed the villages in masks, sometimes referred to as vucari (wolf-humans). The identification of "Neuri" with Proto-Slavs remains controversial, however.