The Glagolitic script is the oldest-known Slavic alphabet. It is generally agreed that it was created in the 9th century for the purpose of translating liturgical texts into Old Church Slavonic by Cyr
A page from the Zograf Codex with text of the Gospel of Luke
The Baška tablet, found in the 19th century on Krk, conventionally dated to about 1100
The first page of the Gospel of Mark from the 10th–11th century Codex Zographensis, found in the Zograf Monastery in 1843
In a book printed in 1591, Angelo Rocca attributed the Glagolitic script to Saint Jerome.
The Cyrillic script is a writing system used for various languages across Eurasia. It is the designated national script in various Slavic, Turkic, Mongolic, Uralic, Caucasian and Iranic-speaking count
Glagolitic script
…include letters for non-Greek sounds, which might have been added by Saint Cyril, as well as ligatures added in the 12th century under the influence of Cyrillic, as Glagolitic lost its dominance. In later centuries, the number of letters dropped dramatically, to fewer than 30 in modern Croatian and Czech…
View of the cave monastery near the village of Krepcha, Opaka Municipality in Bulgaria. Found here is the oldest Cyrillic inscription, dated to 921.
Example of the Cyrillic script. Excerpt from the manuscript "Bdinski Zbornik". Written in 1360.
Cyrillic Script Monument in Antarctica near the Bulgarian base St. Kliment Ohridski