Constantine of Kostenets

Constantine of Kostenets (; – after 1431), also known as Constantine the Philosopher (), was a medieval Bulgarian scholar, writer and chronicler, who spent most of his life in the Serbian Despotate. He is best known for his biography of Serbian despot Stefan Lazarević, which George Ostrogorsky described as "the most important historical work of old Serbian literature", and for writing the first Serbian philological study, ''Skazanije o pismeneh'' (A History on the Letters). He followed the writing style of the Old Serbian ''vita'', first made popular in the Serbian scriptoria of the 12th century. Provided by Wikipedia