Leo Choirosphaktes, sometimes Latinized as Choerosphactes (Greek: Λέων Χοιροσφάκτης) and also known as Leo Magistros or Leo Magister,[1] was a Byzantine official who rose to high office under Emperor Basil I the Macedonian (r. 867–886) and served as an envoy under Emperor Leo VI the Wise (r. 886–912) to Bulgaria and the Abbasid Caliphate. Choirosphaktes was also a well-educated and prominent scholar and writer, many of whose works and correspondence survive.