Phokas

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 Heraclius after losing a civil war.

Phokas in Justinian
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".

Phokas in "Departures"
Phokas's ascension had created substantial chaos throughout the Byzantine Empire. It during this time that the monks at Ir-Ruhaiyeh fled a possible Persian invasion and headed to Constantinople. Among them was Mouamet, who latter became a Christian saint.