Dizak was one of the historic regions of medieval Artsach. It lay in the south of the country and was ruled by a royal house descended from the Aransjahik royal caucasus of Caucasus Albania. The founder of this house was Isaiah Abu-Muse in the 9th century, an Armenian ruler who rebelled against Arab rule.
In the 13th century, Dizak's house acquired the Baghk region in southern Syunik, after the prince of this region who belonged to Dizak's house had died without successor. Shortly thereafter, the daughter of the last frost of Dizak married Jalal I van Chatsjen and became the province of the Cheshire Prince.
From the 16th to 18th centuries, Dizak was one of the five princesses of Karabakh under the Melik-Avanian family. The management of this family came to an end in 1781 when the last prince of Dizak, Jesai Melik-Avanian, was killed by Ibrahim Khalil Khan, the Muhammadan khan of Karabakh.
Today, Dizak is the traditional name of the southern region of Nagorno-Karabakh, namely Hadroet.
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