Syunik (historic province) in the context of "Eastern Armenia"

The Bagratuni or Bagratid dynasty (Armenian: Բագրատունի, Armenian pronunciation: [bagɾatuni]) was an Armenian royal dynasty which ruled the medieval Kingdom of Armenia from c. 885 until 1045. Originating as vassals of the Kingdom of Armenia of antiquity, they rose to become the most prominent Armenian noble family during the period of Arab rule in Armenia, eventually establishing their own independent kingdom. Their domain included regions of Armenia such as Shirak, Bagrevand, Kogovit, Syunik, Lori, Vaspurakan, Vanand and Taron. Many historians, such as Cyril Toumanoff, Nicholas Adontz and Ronald Suny, consider them to be the progenitors of the Georgian royal Bagrationi dynasty.

The Kingdom of Artsakh (Armenian: Արցախի թագավորություն) was a medieval dependent Armenian kingdom on the territory of Syunik and Artsakh provinces, Gardman canton of Utik province, Mazaz and Varazhnunik canton of Ayrarat province. Contemporary sources referred to it as the Khachen. However, because the domain of Khachen during the reign of Prince Hasan Jalal included the entire territory of the modern Nagorno Karabakh Republic plus many contiguous lands to its west, south and north, his principality was often called the Kingdom of Artsakh. The royal house of Khachen was a cadet branch of the ancient Syunid dynasty and was named Khachen, after its main stronghold. Hasan-Jalal traced his descent to the Armenian Aranshahik dynasty, a family that predated the establishment of the Parthian Arsacids in the region.

Artsakh maintained its sovereign rulers, though in the early 13th century they accepted Georgian, then Mongol suzerainty. They lost the royal title after the assassination of Hasan-Jalal (1214–1261) by the Ilkhanid ruler Arghun, but continued to rule Syunik as a principality, which from the 16th century comprised five Armenian melikdoms of Artsakh and Kashatagh melikdom of Syunik which lasted until the early 19th century.

Kingdom of Syunik (Armenian: Սյունիքի թագաորություն), also known as the Kingdom of Baghk and sometimes as the Kingdom of Kapan, was a medieval dependent Armenian kingdom on the territory of Syunik, Artsakh (present-day Nagorno-Karabakh), and Gegharkunik. Ruled by the Siunia dynasty, the town of Kapan was the capital of the kingdom. It existed from 987-1170. Kingdom of Syunik disappeared later than all other Armenian kingdoms in Greater Armenia (Kingdom of Vaspurakan, Kingdom of Vanand, Kingdom of Tashir-Dzoraget, Bagratid Armenia).

Artsakh (Armenian: Արցախ, romanized: Artsʻakh, pronounced [ɑɾˈtsʰɑχ]) was the tenth province (nahang) of the Kingdom of Armenia from c. 189 BC until 387 AD and afterwards made part of the Caucasian Albania, a subject principality of the Sasanian Empire, following the Peace of Acilisene. From the 7th to 9th centuries, it fell under Arab control. In 821, it formed the Armenian principality of Khachen and around the year 1000 was proclaimed the Kingdom of Artsakh, one of the last medieval eastern Armenian kingdoms and principalities to maintain its autonomy following the Turkic invasions of the 11th to 14th centuries.

The Melikdom of Kashatagh (Armenian: Քաշաթաղի մելիքություն) was an Armenian melikdom (principality) which existed in the 15th–18th centuries. It was located along the Hakari River, on the southeastern section of the modern border of Armenia and Azerbaijan. The residences of the meliks were located in the villages of Kashataghk and Khnatsakh, in the west of the present Lachin District of Azerbaijan and the east of the present Syunik region of Armenia respectively.