sentences:  The province of Chaldia effectively became an autonomous semi-hereditary domain of the Gabrades as his father, Theodore Gabras, preceded him as governor.In the 1090s, his older brother Gregory had plotted against the Byzantine emperor Alexios I Komnenos (r. 1081–1118) and had been imprisoned.After service as "strategos" of Philadelphia, Constantine became "doux" of Chaldia some time, probably quite shortly, before the death of Alexios I in 1118.