Cyrillic numeral

The Cyrillic numerals are a numeral system derived from the Cyrillic script, developed in the First Bulgarian Empire in the late tenth century. It was used by the First Bulgarian Empire and by South and East Slavic peoples. The system was used in Russia as late as the early 18th century when Peter the Great replaced it with Arabic numerals. The Cyrillic numerals may still be found in books written in the Church Slavonic language.