WSaint Clement of Ohrid was one of the first Medieval Bulgarian saints, scholar, writer and enlightener of the Slavs. He was one of the most prominent disciples of Saints 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 the First Bulgarian Empire and one of the premier saints of modern Bulgaria. Saint Clement is also the patron saint of North Macedonia, the city of Ohrid and the Macedonian Orthodox Church.
WConstantine of Preslav was a medieval Bulgarian scholar, writer and translator, one of the most important men of letters working at the Preslav Literary School at the end of the 9th and the beginning of the 10th century. Biographical evidence about his life is scarce but he is believed to have been a disciple of Saint Methodius. After his death in 885, Constantine was jailed by the Germanic clergy in Great Moravia and sold as slave in Venice. After a successful escape to Constantinople, he came to Bulgaria around 886 and started working at the Preslav Literary School.
WCyprian was a hierarch and bishop of the Ecumenical Patriarchate of Constantinople, bright opinion writer, editor, translator, and book copyist. He is best known as Metropolitan of Kiev and All Rus' with the Metropolitan see in Moscow. He is commemorated by the Russian Orthodox Church on May 27 and September 16.
WSaint Euthymius of Tarnovo was Patriarch of Bulgaria between 1375 and 1393. Regarded as one of the most important figures of medieval Bulgaria, Euthymius was the last head of the Bulgarian Orthodox Church in the Second Bulgarian Empire. Arguably the best esteemed of all Bulgarian patriarchs, Euthymius was a supporter of hesychasm and an authoritative figure in the Eastern Orthodox world of the time.
WSaint Naum, also known as Naum of Ohrid or Naum of Preslav was a medieval Bulgarian writer, enlightener, one of the seven Apostles of the First Bulgarian Empire and missionary among the Slavs. He was among the disciples of Saints Cyril and Methodius and is associated with the creation of the Glagolitic and Cyrillic script. Naum was among the founders of the Pliska Literary School. Afterwards Naum worked at the Ohrid Literary School. He was among the first saints declared by the Bulgarian Orthodox Church after its foundation in the 9th century.
WCosmas 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.
WGregory Tsamblak or Grigorij Camblak (Bulgarian: Григорий Цамблак; was a Bulgarian writer and cleric who was the metropolitan of Kiev between 1413 and 1420. A Bulgarian noble, Tsamblak lived and worked Bulgaria, but also in Medieval Serbia and Kyivan Rus and indebted these two countries to himself through his literary works, which represent a heritage of their national literatures, particularly the style of Old Serbian Vita made popular in the monasteries of the 12th century.