During the Middle Ages the strong Bulgarian fortress of Boyana (Batil) stood on the lower slopes of Mount Vitosha in what is now the Sofia suburb of Boyana. This name is mentioned for the firs time in 969. Boyana was one of the thirty-five fortresses and settlements, which formed the fortification systems of the city of Sredets (Sofia). The Boyana Church was build within the fortress and is a magnificent example of medieval architecture and monumental art.
The Boyana Church is about 900 years old. During its existence, the Church has undergone many transformation and extensions, and thus its present complex volume differs considerably from the original. New buildings have been added to the First (East) Church, architectural transformations have been made, the decoration has been changed. At present the Boyana Church consists buildings - from the 11th, 13th and 19th centuries. Only the first two churches, built during the Middle Ages, possess significant aesthetic and architectural value.