Ivan Bilibin, Baba Yaga, an illustration for a Russian fairy tale (1900s).
Key myth
In Czech, Polish and Slovak villages, a straw effigy called Marzanna (or Morena) is carried out and drowned or burned to end winter. Chroniclers such as Jan Długosz in the 15th century call 'Marzanna' the Polish Ceres.
Where sources differ or caution applies. Whether it records a pre-Christian goddess or a folk custom is unclear.