The Golden Age of Bulgaria is the period of the Bulgarian cultural prosperity during the reign of emperor Simeon I the Great (889—927). The term was coined by Spiridon Palauzov in the mid 19th century.
Simeon I achieved spectacular military and political successes, expanding Bulgarian territory and forcing the Byzantine Empire to recognise the imperial title of the Bulgarian monarchs. The capital Preslav was built in Byzantine fashion to rival Constantinople. Among the city's most remarkable edifices were the Round Church, also known as the Golden Church, and the imperial palace. At that time was created and painted Preslavian pottery, which followed the most prestigious Byzantine models. A chronicle of the 11th century testified that Simeon I had built Preslav for 28 years.
Simeon I gathered around himself the so called Simeon's circle, that included some of the most prominent literary authors in medieval Bulgaria. Simeon I himself is alleged to have been active as a writer: works that are sometimes credited to him include Zlatostruy (Golden stream) and two of Simeon (Svetoslavian) collections (first in transcript of 1234, and the second - in 1299).
The most important genres were Christian edifying oratory eulogies, lives of saints, anthems and poetry, chronicles, and historical narratives. Remarkable works include Hexameron by John Exarch, Didactic Gospel (including the Alphabet prayer) by Constantine of Preslav, An Account of Letters by Chernorizets Hrabar. The names of the other authors of Simeon circuit were Tudor Dox, Prester John and Prester Gregory but none of their works are preserved.