Leo VI the Wise

Leo VI the Wise (866–912) was Byzantine emperor from 886 to 912. Reputedly Michael III's son by Eudokia Ingerina, his paternity was uncertain. His relationship with Basil deteriorated, and an accusation of conspiracy nearly cost him his sight. He completed the Basilika law code and wrote the treatise Tactica.

War with Simeon I of Bulgaria brought defeat at Boulgarophygon in 896 and annual tribute, and Leo of Tripoli sacked Thessalonica in 904. His four marriages to secure an heir pitted him against the patriarch, whom he replaced. He died in May 912, leaving young Constantine VII to his brother Alexander.