Thoros II, Prince of Armenia  Thoros II, Prince of Armenia, also known as Toros II the Great () or Thoros II the Great, (unknown – February 6, 1169) was the sixth Lord of Armenian Cilicia from the Rubenid dynasty from 1144/1145–1169. Referred to as the “Lord of the Mountains”  Thoros (together with his father, Leo I and his brother, Roupen) was taken captive and imprisoned in Constantinople in 1137 after the Byzantine Emperor John II Comnenus during his campaign against Cilicia and the Principality of Antioch, successfully had laid siege to Gaban and Vahka (currently, Feke in Turkey). All Cilicia remained under Byzantine rule for eight years. Unlike his father and brother, Thoros survived his incarceration in Constantinople and was able to escape in 1143. Whatever the conditions in which Thoros entered Cilicia, he found it occupied by many Greek garrisons. He rallied around him the Armenians in the eastern parts of Cilicia and after a persistent and relentless pursuit of the Greeks, he successfully ousted the Byzantine garrisons from Pardzerpert (now Andırın in Turkey), Vahka, Sis (today Kozan in Turkey), Anazarbus, Adana, Mamistra and eventually Tarsus. His victories were aided by the lack of Muslim attacks in Cilicia and from the setbacks the Greeks and the Crusaders suffered on the heels of the Siege of Edessa in 1144. Emperor Manuel I Comnenus, unhappy with Thoros's progress in the areas still claimed by the Byzantine Empire, sought peaceful means to settle his conflict with Thoros, but his attempts bore him no fruits. The recovery before 1150 of the Taurus fortresses by Thoros had not seriously affected Greek power, but his conquest of Mamistra in 1151 and the rest of Cilicia in 1152 had necessitated a great expedition. As a result, during the course of the next 20 years there were no less than three separate military campaigns launched by the emperor against Thoros, but each campaign was only able to produce a limited success. Thoros's accomplishments during his reign placed Armenian Cilicia on a firm footing. Thoros was the second son of Leo I, lord of Armenian Cilicia. The name and the origin of his mother are not known with certainty. It is possible that she was a daughter of Count Hugh I of Rethel, or she may have been the daughter of Gabriel of Melitene.