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 Saint Cyril, a monk from Thessalonica. He and his brother Saint Methodius were sent by the Byzantine Emperor Michael III in 863 to Great Moravia to spread Christianity there. After the deaths of Cyril and Methodius, their disciples were expelled and they moved to the First Bulgarian Empire instead. The Early Cyrillic alphabet, which developed gradually in the Preslav Literary School by Greek alphabet scribes who incorporated some Glagolitic letters, gradually replaced Glagolitic in that region. Glagolitic remained in use alongside Latin in the Kingdom of Croatia and alongside Cyrillic until the 14th century in the Second Bulgarian Empire and the Serbian Empire, and later mainly for cryptographic purposes.
Cyril and Methodius were brothers, Byzantine Christian theologians and missionaries. For their work evangelizing the Slavs, they are known as the "Apostles to the Slavs".
Old Church Slavonic or Old Slavonic is the first Slavic literary language and the oldest extant written Slavonic language attested in literary sources. It belongs to the South Slavic subgroup of the Balto-Slavic branch of the Indo-European language family and remains the liturgical language of many Christian Orthodox churches. Until the reforms of Patriarch Nikon of Moscow between 1652 and 1666, Church Slavonic was the mandatory language of the Russian Orthodox Church.
The Preslav Literary School, also known as the "Pliska Literary School" or "Pliska-Preslav Literary school" was the first literary school in the medieval First Bulgarian Empire. It was established by Boris I in 886 in Bulgaria's capital, Pliska. In 893, Simeon I moved the seat of the school from the First Bulgarian capital Pliska to the new capital, Veliki Preslav. Preslav was captured and burnt by the Byzantine Emperor John I Tzimisces in 972 in the aftermath of Sviatoslav's invasion of Bulgaria.
Chernorizets Hrabar was a Bulgarian monk, scholar and writer who worked at the Preslav Literary School in the First Bulgarian Empire at the end of the 9th and the beginning of the 10th century. He is credited as the author of On the Letters.
The Basarabi-Murfatlar Cave Complex is a medieval Christian monastery located near the town of Murfatlar, Constanța County, Northern Dobruja, Romania. The complex is a relict from a widespread monastic phenomenon in 10th century Bulgaria.
The Codex Zographensis is an illuminated Old Church Slavonic canon manuscript. It is composed of 304 parchment folios; the first 288 are written in Glagolitic containing Gospels and organised as Tetraevangelium, and the rest written in Cyrillic containing a 13th-century synaxarium. It is dated back to the end of the 10th or beginning of the 11th century.
The Codex Marianus is an Old Church Slavonic fourfold Gospel Book written in Glagolitic script, dated to the beginning of the 11th century, which is, one of the oldest manuscript witnesses to the Old Church Slavonic language, one of the two fourfold gospels being part of the Old Church Slavonic canon.
The painting of the Tarnovo Artistic School was the mainstream of the Bulgarian fine arts between 13th and 14th centuries named after the capital and the main cultural center of the Second Bulgarian Empire, Tarnovo.
Medieval Bulgarian literature is Bulgarian literature in the Middle Ages.
The Church of St Demetrius is a Bulgarian church dating from the Late Middle Ages near the town of Boboshevo, Kyustendil Province.
Cosmas the Priest, also known as Cosmas the Presbyter or Presbyter Cosmas, was a medieval Bulgarian priest and writer. Cosmas is most famous for his anti-Bogomil treatise Sermon Against the Heretics, which, despite not being conclusively dated, is generally ascribed to the 10th century. The treatise is a valuable source on the beginnings of the Bogomil heresy in Bulgaria, as well as on medieval Bulgarian society.
Reims Gospel is an illuminated manuscript of Slavonic (Slavic) origin which became part of the Reims Cathedral treasury. Henry III of France and several of his successors including Louis XIV took their oath on it. In the time of Charles IV, who gave it to the just-founded Emmaus monastery in Prague, the text was believed to have been written by the hand of St. Procopius.
Clement or Kliment of Ohrid was one of the first medieval Bulgarian saints, scholar, writer, and apostle to the Slavs. He was one of the most prominent disciples of Cyril and Methodius and is often associated with the creation of the Glagolitic and Cyrillic scripts, especially their popularisation among Christianised Slavs. He was the founder of the Ohrid Literary School and is regarded as a patron of education and language by some Slavic people. He is considered to be the first bishop of the Bulgarian Orthodox Church, one of the Seven Apostles of Bulgarian Orthodox Church since the 10th century, and one of the premier saints of modern Bulgaria. The mission of Clement was the crucial factor which transformed the Slavs in then Kutmichevitsa into Bulgarians. Clement is also the patron saint of North Macedonia, the city of Ohrid and the Macedonian Orthodox Church.
The Enina Apostle or Enina Apostolos is an 11th-century Old Church Slavonic Cyrillic manuscript. Discovered in a poor condition in 1960 during restoration work in the central Bulgarian village of Enina, the partially preserved parchment manuscript is housed in the SS. Cyril and Methodius National Library in Sofia. It is the oldest Cyrillic manuscript currently held by any Bulgarian collection.
The Ohrid Gospel or Ohrid Glagothic fragments is a Glagolitic manuscript from the 10th century AD. It contains text from the Gospel of Luke 24 and parts of the Gospel of John, written on 20 leaves of parchment, each about 17 cm × 20 cm each.
The Bojana Palimpsest or Bojana Gospel is an 11th-century Old Church Slavonic manuscript, originally written in a Glagolitic manuscript. In the 13th century, the Glagolitic text was removed, and the parchment was reused to write a Cyrillic gospel.
The Ohrid epistolary is a Middle Bulgarian Glagolitic manuscript from the late 12th or early 13th century, from the Ohrid Literary School.
The Bitola Triodion is a Middle Bulgarian Glagolitic manuscript that contains a triodion from the late 12th century.
