Ruben I (Armenian: Ռուբեն Ա) also Roupen I or Rupen I (1025/1035 – Kormogolo 1095) was the first lord of Armenian Cilicia or “Lord of the Mountains” (1080/1081/1082 – 1095). He declared the independence of Cilicia from the Byzantine Empire thus formally founding the beginning of Armenian rule there. The Roupenian dynasty ruled Cilician Armenia until 1219.
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