Flavius Phocas Augustus (also Phokas) (d. 610) reigned as Byzantine Empire from 602–610, having usurped the throne from the Emperor Maurice. He was himself overthrown by Heraklieos after losing a civil war.
In his memoir, Justinian II made several references to Phokas, and how Justinian's ancestor Herakleios had overthrown him. Justinian frequently villified Phokas, at one point calling him "Phokas the monster".[1]