Leo I, Prince of Armenia

For another Leo I of Armenia, see Leo I, King of Armenia.
Leo I
Lord of Cilicia / “Lord of the Mountains”
Lord of Armenian Cilicia
Reign 1129/1130–1137
Predecessor Constantine II
Successor Thoros II (in 1144/45)
Born (unknown)
Died February 14, 1140
Burial (unknown)
Spouse (unknown)
Issue one/two unnamed daughter(s)
(?) Constantine
Thoros II
Mleh I
House Roupenians
Father Constantine I
Mother An unnamed great-granddaughter of Bardas Phokas

Leo I[1](Armenian: Լեիոն Ա), also Levon I[2][3] or Leon I,[4] (unknown[2] – Constantinople, February 14, 1140[2]) was the fifth lord of Armenian Cilicia[3] or “Lord of the Mountains”[2] (1129[2][3]/1130[1]-1137[1][3]).

He learned to exploit the open, yet restrained, hostilities between the Byzantine Empire and the Crusader principalities of Edessa and Antioch.[3] Most of his successes benefited from Byzantium’s pre-occupation with the threats of Zengi (the atabeg of Mosul) from Aleppo and the lack of effective Frankish rule, especially in the Principality of Antioch.[3]

He expanded his rule over the Cilician plains and even to the Mediterranean shores.[4] In his time, relations between the Armenians and the Franks (the Crusaders), two former allies, were not always as courteous as before: a major cause of dissension between them was the ownership of the strongholds of the southern Amanus, and on the neighboring coasts of the Gulf of Alexandretta.[4]

/Leo/ invited many famous warriors to join him, and allured them by great rewards. Forward in battle, he prepared himself, and often fought against the foreigners or infidels, took their forts and put all the inhabitants to the sword. He was the admiration of warriors, and the fear of foreigners or infidels, so that they called him the new Ashtahag.
Vahram of Edessa: The Rhymed Chronicle of Armenia Minor[5]

Leo was defeated decisively by the Byzantine Emperor John II Comnenus who successfully laid siege to his fortresses.[3] Leo and two of his sons were taken captive and imprisoned in Constantinople where Leo died shortly after.[3]

His early life

Leo was the younger son of Constantine I, lord of Armenian Cilicia.[2] It is likely that his mother was the great-granddaughter of Bardas Phokas.[2]

When Constantine I died, Leo’s brother Thoros I succeeded him;[3] Leo may have ruled in the eastern part of “the Mountains” during the lifetime of his brother (although the basis of this proposition is not known).[2] Sometime between 1100 and 1103,[2] Count Baldwin II of Edessa gave his sister in marriage to Leo;[3] but the name and origin of his wife are not known with certainty.[2] It is also possible that his wife was Baldwin II’s sister-in-law, a daughter of the Armenian Gabriel of Melitene.[2]

In 1111, Sultan Malik Shah of Iconium entered Armenian territories, and two of the commanders of Leo’s brother were killed in battle.[3] Saddened by this lost, Leo was so enraged that he launched a savage attack against the Turks and drove them into retreat.[3] In 1118, Leo assigned by his brother[3] brought a contingent to help Prince Roger of Antioch at the siege of Azaz (today A'zāz in Syria).[1]

His rule

Armenian Cilicia and the Levant in 1135 CE.

Thoros I died in 1129 (or in 1130), and his son Constantine II died a few months later, in the course of a palace intrigue.[1] Other authors (e.g., Jacob G. Ghazarian, Vahan M. Kurkjian) suggest that Thoros I died without a male heir and was directly succeeded by Leo.[3][4]

Conflicts with the Franks

In February 1130, Bohemond II, Prince of Antioch, whose ambition was to restore his principality, thought that the moment had come to recover Anazarbus (a former Antiochene town which had fallen into the possession of Thoros I).[1] He marched with a small force up the river Jihan towards his objective.[1] Leo was alarmed and appealed for help to the Danishmend emir, Ghazi.[1] As Bohemond II progressed carelessly up the river, meeting only light resistance from the Armenians, the Danishmend Turks fell on him and massacred the whole of his army.[1] However, it was due to Byzantine intervention that the Turks did not follow up their victory; and Anazarbus remained in Armenian hands – Michael the Syrian says that John II Comnenus at once started an offensive against the Turks.[1]

Soon after Bohemond II’ death, Leo protected in his rear by an alliance with the Danishmend emir, descended into the plain; after a brief unsuccessful siege of Seleucia,[3] he seized the three cities of Mamistra, Tarsus and Adana in 1131.[1] In 1133, Leo captured Sarventikar, on the slopes of the Amanus Mountains, from Baldwin of Marash.[1] But the Armenian hold over Cilicia was weak: bandits found refuge there, and pirates hung about its coasts.[1]

In 1136, the new prince of Antioch, Raymond I decided that his first action must be to recover Cilicia.[1] With the approval of King Fulk of Jerusalem he marched with Baldwin of Marash against Leo.[1] But Leo, with the help of Count Joscelin II of Edessa (who was his nephew), drove back the Antiochene army.[1] Triumphant, Leo agreed to have a personal interview with Baldwin of Marash, who treacherously made him prisoner and sent him off to captivity in Antioch.[1]

In Leo’s absence his three sons quarreled: the eldest, Constantine, was eventually captured and blinded by his brothers.[1] Meanwhile, the Danishmend emir, Mohammed II ibn Ghazi, invaded Cilicia, destroyed the harvest.[1] Shaken by these disasters, Leo bought his freedom by offering to give up the Cilician cities (Sarventikar, Mamistra and Adana)[4] to Raymond I;[1] in addition he paid 60,000 gold pieces and gave his son as a hostage;[4] but on his return home he forgot his promise.[1] A desultory war broke out again, till, early in 1137, Joscelin II patched up a truce between the combatants.[1] An alliance was then formed against the Emperor John II Comnenus, who was then pressing his claims against Antioch as well as Cilicia.[4]

The (re-)occupation of Cilicia by the Byzantines

In the spring of 1137, the imperial army, with the Emperor and his sons at its head, assembled at Attalia (today Antalya in Turkey) and advanced eastward into Cilicia.[1] Leo moved up in an attempt to check its progress by taking the Byzantine frontier fortress of Seleucia, but was forced to retire.[1] The Emperor swept on, past Mersin, Tarsus, Adana and Mamistra, which all yielded to him at once.[1]

Leo relied on the great fortifications of Anazarbus to hold him up.[1] Its garrison resisted for 37 days, but the siege engines of the Byzantines battered down its walls, and the city was forced to surrender.[1] Leo retreated into the high Taurus Mountains; the Emperor, after mopping up several Armenian castles in the neighborhood, led his forces southward into the plain of Antioch.[1]

After the Emperor had asserted his authority over the Principality of Antioch, he returned to Cilicia to finish off its conquest.[1] The family castle of Vahka (today Feke in Turkey) held out for some weeks, but after its fall Leo and two of his sons, Roupen and Thoros, were captured.[1]

His last years in exile

Leo and his two sons were sent to prison in Constantinople, where Roupen was soon put to death.[1] Leo and Thoros gained the favor of the Emperor and were allowed to live under surveillance at the Court.[1]

Leo died in Constantinople.[3]

Marriage and children

The name and the origin of his wife are not known with certainty.[2] It is possible that his wife was Béatrice, daughter of Count Hugh I of Rethel, or she may have been the daughter of Gabriel of Melitene.[2]

(Leo’s second marriage proposed by Rüdt-Collenberg is speculative.)[2]


  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Runciman, Steven. A History of the Crusades – Volume II.: The Kingdom of Jerusalem and the Frankish East: 1100–1187.
  2. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Cawley, Charles (2009-04-01), Lords of the Mountains, Kings of (Cilician) Armenia (Family of Rupen), Medieval Lands database, Foundation for Medieval Genealogy,
  3. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Ghazarian, Jacob G. The Armenian Kingdom in Cilicia during the Crusades: The Integration of Cilician Armenians with the Latins (1080–1393).
  4. 1 2 3 4 5 6 7 Vahan M. Kurkjian (2005-04-05). "A History of Armenia". Website. Bill Thayer. Retrieved 2009-07-19.
  5. Vahram (2008-09-10). "Chronicle". Text Archive. Internet Archive. Retrieved 2009-07-19.


External links

Leo I, Prince of Armenia
Regnal titles
Preceded by
Constantine II
Lord of Armenian Cilicia
Succeeded by
Thoros II
(in 1144/45)
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