John the Exarch
John the Exarch (also transcribed Joan Ekzarh; ) 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. He was active during the reign of Boris I (852–889) and his son Simeon I (893–927). His most famous work is the compilation "Shestodnev" (Шестоднев – Hexameron) that consists of both translations of earlier Byzantine authors and original writings. Life. Evidence about his life is scarce but his literary legacy suggests an excellent knowledge of Greek  language. It is therefore assumed that John the Exarch received his education in the Byzantine Empire. Some historians assume that his sobriquet "the Exarch" means that he was the Archbishop of Bulgaria. Others suggest that this was not an bishopric rank. There are also theories that identify John the Exarch with Chernorizets Hrabar or with John of Rila. Literary activities. John the Exarch's literary work includes a number of translations of medieval Byzantine authors, the most important of which is the translation, around 895, of "On Orthodox Christianity" by the Byzantine theologian John of Damascus. He is also the  author of several original works and compilations, the most important whereof is the compilation "Шестоднев" ("Shestodnev"). The compilation includes parts of the works of several Byzantine authors, most notably Basil the Great, as well as original parts which give valuable first-hand evidence about the Bulgarian Empire under Simeon I (893–927). John the Exarch describes the royal palace and the Bulgarian ruler that includes information about his attire, the boyars, the social stratification of the Bulgarian society and like matters.