Biography
Isaac of Armenia (354–439) was Catholicos (or Patriarch) of the Armenian Apostolic Church. He is sometimes known as "Isaac the Great," and as "Sahak the Parthian" (Armenian: Սահակ Պարթեւ, Sahak Parthew", Parthian: Sahak-i Parthaw) owing to his Parthian origin.
Biography text from Last.fm, available under CC BY-SA.