David (born 630) was one of three co-emperors of the Byzantine Empire for a few months in late 641. David was the son of Emperor Heraclius and his wife and niece Empress Martina. His name was an attempt to link the family with the Biblical David. After the death of Heraclius in February 641 a power struggle ensued. In a compromise, 10-year-old David was raised to co-emperor, alongside his brother Heraclonas and their nephew Constans II. At the time the Byzantine state faced the ongoing Muslim conquest of Egypt and continuing religious strife over monothelitism and other Christological doctrines. All three emperors were children and the Empress Dowager Martina acted as regent. Martina was deeply unpopular due to her incestuous relationship with Heraclius and her unconventional habits. Her regime was deposed, probably by January 642. She and her sons were exiled to Rhodes and, in an early example of Byzantine political mutilation, Martina's tongue was cut out and her sons' noses were cut off. (Full article...)