Artsakh (, ) was the tenth province (nahang) of the Kingdom of Armenia from 189 BC until 387 AD and afterwards a region of Caucasian Albania from 387 to the 7th century under suzerainty of Sassanid Persia. 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.