No extant evidence of pre-Christian Slavic writing exists, but early Slavic forms of writing or proto-writing may have been mentioned in several early medieval sources.

Pre-Christian Slavic writing is a hypothesized writing system that may have been used by the Slavs prior to the introduction of Christianity and the Glagolitic and Cyrillic alphabets.

Despite a lack of pre-Christian Slavic writings describing the details of the "Old Religion", many pagan spiritual beliefs and rituals have been sustained by Slavic peoples even after their lands were Christianized.