Heraclius Constantine was a Byzantine emperor who held power for only three months in 641. Born in 612 to Emperor Heraclius and Fabia Eudokia, he was crowned as Augustus in 613 during his infancy. Throughout his youth, he participated in the defense of Constantinople during the siege of 626. Although he spent much of his life in a subordinate role alongside his father and later his half-brother, he became the senior emperor upon his father's death. He died in Chalcedon later that same year.