Cyrillic Extended-C Unicode Block

Cyrillic Extended-C is a small set of characters designed to represent historical and alternative letterforms of the Cyrillic script, primarily for the purpose of accurately encoding Old Church Slavonic and other early Slavic texts. It includes uppercase and lowercase variants of letters that were used in medieval manuscripts but are not part of the modern standard Cyrillic alphabet, such as the rounded and angled forms of certain vowels and consonants. These characters enable scholars and digital archivists to preserve the orthographic nuances of historical documents without resorting to font tricks or private-use encodings. The block also helps differentiate between visually similar glyphs that carry distinct phonetic or grammatical values in ancient writing systems.