His place of death happens to have been named after Helena , mother of Constantine and his own grandmother , thus realizing the prophecy .
An alleged prophecy at his birth had said Constans would die in the arms of his grandmother .
Constans ' place of death happens to have been named after Helena , mother of Constantine and his own grandmother , thus realizing prophecy prophecy .
An alleged prophecy at his birth had said Constans would die in the arms of his grandmother .