Old Church Slavonic
Old Church Slavonic is a liturgical language of Eastern Orthodox Christianity, and is usually associated with Orthodox churches with Slavic roots. It is the earliest literary Slavic language, and is based on the early medieval Slavic dialect of the Thessalonica region (in modern Greece).
While hugely influential in the development of Slavic languages, and often referred to as Old Slavic, it does not enjoy the same relationship with modern Slavic languages as a root language as Latin does with Romance languages. The root language of Slavic languages is instead proto-Slavonic.
The Old Slavic used by many Slavic-language Orthodox Churches today is not necessarily identical to the original Old Church Slavonic, though it remains closely related.
In NationStates, Old Church Slavonic is believed to be one of the two root languages (along with liturgical Greek) upon which Old Church Liturgic, the language of the Holy Monastic Republic of the Archregimancy, is based.
One of the extant texts of the Codex Frosticus, the ancient document that remains the main source of our knowledge of the mysterious Holy Empire of Alasdair I Frosticus is written in Old Church Slavonic, in the Glagolithic alphabet.
