Euphemius

Euphemius was a Byzantine official and usurper who briefly controlled parts of the Byzantine Empire in the early 9th century. He was a native of the theme of Opsikion and held the rank of patrikios.

In 797, Euphemius supported the plot to depose and blind Emperor Constantine VI, which led to the ascension of Empress Irene. However, Euphemius soon found himself at odds with Irene's rule. He became a leader of a rebellion against her in 803, driven by a combination of personal ambition and discontent with Irene's policies.

The rebellion, centered in Anatolia, gained significant support. Euphemius declared himself emperor and marched against Irene. However, his forces were ultimately defeated by the imperial army. Following his defeat, Euphemius fled and his rebellion collapsed. He is believed to have died shortly thereafter, possibly in exile. The exact circumstances of his death are not precisely recorded. His brief rise and fall highlight the turbulent political landscape of the Byzantine Empire during this period.