Some sources write that Smbataberd was constructed during the 9th, 10th or 11th centuries, although others suggest that it may have existed as early as the 5th century or earlier, and was extensively fortified in the 10th century. Smbataberd served as the citadel for the settlement of Yeghegis, which was the seat of the
Syuni princes of
Syunik in the 9th and 10th centuries. The construction and name of Smbataberd is traditionally connected with the 10th-century prince Smbat Syuni (mentioned by
Stepanos Orbelian as living in 936). In the 970s, with the foundation of the
Kingdom of Syunik, the branch of the Syuni dynasty which ruled the kingdom made
Kapan its capital, while a separate branch of the dynasty maintained its seat at Yeghegis. In 1002 or 1003, the branch of the Syunis based in Yeghegis submitted to the rule of the
Bagratid king
Gagik I of Armenia. According to historian and archaeologist Sedrak Barkhudaryan, Smbataberd, the settlement of Yeghegis, and the monastery of Tsaghats Kar formed "an architectural, spiritual and political whole" under the Yeghegis-based branch of the Syunis. This branch lost much of its political importance after the fall of the Bagratid kingdom (1045) and were eventually replaced by the Orbelians, who came to rule most of Vayots Dzor and Syunik in the 13th century. Yeghegis reached its zenith in the 13th century under the Orbelians, who made it their seat. The Orbelian ruler Smbat () restored and fortified Smbataberd. Smbataberd survived several sieges throughout its existence. Notably, it was successfully defended against the
Sajid general Nasr sent by
Yusuf ibn Abi'l-Saj in the early 10th century. According to one folk tradition, the
Seljuks were able to capture the fortress by cutting off its water supply by using a thirsty mule or horse to find the source of the water. == Restoration efforts and tourism ==