When Moldova Adopted CyrillicMedieval Era: The Cyrillic script arrived between the 9th and 10th centuries. It was introduced alongside Christianity, primarily through the influence of the First Bulgarian Empire. This script became the official writing system for the Principality of Moldavia when it was founded in the 14th century.
Oldest Romanian document was written in Cyrillic - https://en.wikipedia.org/wiki/Neac%C8%99u%27s_letter