Theodore Mangaphas
Theodore Mangaphas or Mankaphas was a Greek nobleman from Philadelphia, who assumed the title of Byzantine emperor twice, first during the reign of Isaac II Angelos, and secondly after the sacking of Constantinople during the Fourth Crusade.
He was given the sobriquet Morotheodoros meaning "Theodore the Fool", by the Greek chroniclers after his repeated failed usurpations.
First usurpation
In circa 1188, Theodore, likely already the ruler of his native Philadelphia, secured the allegiance of the larger part of the city's inhabitants, but also of the surrounding areas of Lydia and the support of the Armenian communities in the Troad. He then proclaimed himself emperor in opposition to Isaac II Angelos, and even minted his own silver coinage. As the revolt gained ground, its progress alarmed Isaac so much that the emperor marched against Theodore in person. After some initial skirmishes, Theodore was besieged in Philadelphia, but then Isaac learned of the rapid approach of the Holy Roman Emperor, Frederick Barbarossa who was on his way to take part in the Third Crusade. This made Isaac anxious to conclude the war against Theodore, and so he agreed to pardon Mangaphas, on the condition that the usurper submitted himself to Isaac and agreed to lay aside the imperial symbols and surrender hostages. He was then allowed to retain control of Philadelphia as its governor.In circa 1193, however, Basil Vatatzes, the doux of the Thracesian theme and megas domestikos of the Byzantine army, forced him to flee to the court of the Seljuk Turks at Iconium. There, the Sultan Ghīyāth al-Dīn Kaykhusraw allowed Theodore to enroll troops among the nomadic tribes, and with these bands he ravaged the frontier lands of the Byzantine Empire in 1195–1196. During which time in 1193, he sacked the church in Chonai and sold captive Christian prisoners.
In late 1196, the new emperor, Alexios III Angelos, bought Mangaphas from the sultan, on condition that his life was to be spared, and that he would not spend the rest of his life in prison. He remained in prison for an unknown period of time before he was released and returned to Philadelphia.