Constantine has been described by the orthodox historians of his time as a.
The premature death of Constantine, in May 641, left Heracleonas sole ruler.
It comprised the principalities of Tribunia or Travunja, with its capital at Trebinje; and Hlum or Hum, the Zachlumia of Constantine Porphyrogenitus, who gives a clear picture of this region as it was in the 10th century.'
The siege had lasted fifty-three days when, on the 29th of May 1453, a tremendous assault was successful; the desperate efforts of the Greeks were unavailing, Constantine himself falling among the foremost defenders of the breach.
During the campaign Peter had entered into alliance with the hospodars of Moldavia and Walachia, respectively Demetrius Cantemir and Constantine Brancovano, from whom he had received material assistance.