The Nakhchivan Autonomous Republic is a landlocked exclave of the Republic of Azerbaijan. The region covers 5,500 km2 with a population of 414,900, bordering Armenia to the east and north, Iran to the south and west, and Turkey to the northwest.
The area that is now Nakhchivan became part of the Safavid dynasty of Iran in the 16th century. In 1828, after the last Russo-Persian War and the Treaty of Turkmenchay, the Nakhchivan Khanate passed from Iranian into Imperial Russian possession. After the 1917 February Revolution, Nakhchivan and its surrounding region were under the authority of the Special Transcaucasian Committee of the Russian Provisional Government and subsequently of the short-lived Transcaucasian Democratic Federative Republic.
Wikipedia https://en.wikipedia.org/wiki/Nakhchivan_Autonomous_Republic
Coordinates 39°12'24.205" N 45°24'30.218" E