Proto-Indo-European mythology refers to the beliefs and stories of the ancient people who spoke the Proto-Indo-European language. It is associated with the early Indo-European religions and encompasses a range of deities, themes, and legends. Synonyms for Proto-Indo-European mythology include the Proto-Indo-European religion, the early Indo-European belief system, and the mythology of the ancient Indo-European people. Other terms that may be used to refer to similar concepts include Indo-European paganism, early polytheism, and prehistoric religion. Regardless of the specific term used, the study of Proto-Indo-European mythology is an important field for understanding the ancient beliefs of many different cultures across Eurasia.