Cyrillic is a [writing system](/glossary/writing_system), named after the missionary work of St. Cyril in the first Bulgarian Empire. The original Cyrillic script was based on uppercase [Greek](/glossary/greek_script) [letterforms](/glossary/letterform).

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![The phrase “истински майстор на научната фантастика”—which translates in English to “a true master of science fiction”—set in three different typefaces that support the Cyrillic script.](images/thumbnail.svg)

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Cyrillic was originally developed in the 10th century for speakers of the Proto-Slavic language. Today, the script is used for various languages across Eurasia and beyond.