Leo Choirosphaktes, sometimes Latinized as Choerosphactes and also known as Leo Magistros or Leo Magister, was a Byzantine official who rose to high office under Emperor Basil I the Macedonian and served as an envoy under Emperor Leo VI the Wise to Bulgaria and the Abbasid Caliphate. Choirosphaktes was also a well-educated and prominent scholar and writer, many of whose works and correspondence survive.

Tsar Simeon I the Great ruled over Bulgaria from 893 to 927, during the First Bulgarian Empire. Simeon's successful campaigns against the Byzantines, Magyars and Serbs led Bulgaria to its greatest territorial expansion ever, making it the most powerful state in contemporary Eastern and Southeast Europe. His reign was also a period of unmatched cultural prosperity and enlightenment later deemed the Golden Age of Bulgarian culture.