Constantine of Baberon (died c. 1263) was a powerful Armenian noble of the Het‛umid family. He was the son of Vassag and the father of King Het‛um I, who ruled the Armenian Kingdom of Cilicia from 1226 to 1270. Constantine played a pivotal role in placing his son on the throne by engineering the murder of Philip, the husband of Isabella, Queen of Armenia. He tricked Philip’s father, Bohemond IV of Antioch, to search for his son at Amouda rather than at Sis, where he was being tortured and poisoned. He then took his army to the gates of Silifke Castle, forced its Frankish lords to surrender Isabella, and arranged the marriage, making his son the first Het‛umid ruler of the Armenian Kingdom.
Constantine began construction on the elaborate baronial apartments at Baberon (Çandır Castle), which were still standing in 1979. Nearby, at a site known today as Kız Kilisesi near Gösne, he built a monastic retreat with an ornate chapel whose dedicatory inscription is dated to 1241.
Constantine, also known as the Grand Baron Constantine, was married to Alix Pahlavouni (a third-cousin of Leo II), with whom he fathered: