NORTHERN BORDERS OF EARLY MEDIEVAL AZERBAIJAN ACCORDING TO ARMENIAN AND ARAB-MUSLIM SOURCES 1 The article aims to study the administrative and political map of the South-Eastern Caucasus and North-Western Iran in the era of Sasanian Iran (227-651) and the Arab Caliphate (632-1258) on the basis of information from the ancient Armenian (V-XIII) and Arab-Muslim (IX-XIII) geographical and historical literature, mainly to clarify northern regions and borders of early medieval Azerbaijan (III-IX)2. Keywords: Iranian Azerbaijan, Caucasian Bush of Sasanian Iran, Iranian Marzbanstvo of Aderbaygan, Northern Vilayet of the Arab Caliphate, Arab province of Adzarbayjan. In the full edition of the Ancient Armenian geography "Ashkharatsuyts" (lit. "Showing the world")3 we find Eranshahr (Iran) divided into four bushes (cf. Persian, kust / ag/, lit. side, meaning viceroyalty): Khorasan (Khorbaran) in the west, Nmroj 1 This work was funded by the grant of the President of the Russian Federation for state support of young Russian scientists - Doctors of Sciences MD-1664.2012.6, project: "Russian Academy of Science and National Geography of the South Caucasus (Transcaucasia) and the Armenian Highlands". 2 The name of the country "Azerbaijan" is an Arabized form of the srsdnepsrsi toponym or it goes back to the Parthian (other-Greek ufsprbfznz, wed-Greek udsbvygnshn, etc. - arm. this, in turn, goes back to the name of the last Achaemsnid satrap of Media, Atropates (other-Persian. who, after the death of Alexander the Great in 323 BC, declared himself an independent king in the north of Media. Descendants of Atropates with the Persian title ("king") They ruled here until 6 BC. Then the Arsacids, who ruled in the Parthian empire (247/238 BC-224/227 AD), elevated a representative of their dynasty to the throne in Aturpatakans, and in 78 AD annexed this kingdom. When the Sassanids came to power in Iran in 227 AD, the marzban (military border region)was formed under the name Aderbaygan. 3 A ... Read more