Destruction of the gradually-abandoned fifth century mediaval city of Ani (situated in Turkey's provine of Kars near Armenia) occurred when sacked by Mongols, when devastated by a 1319 earthquake, and when Marr's excavations and building repairs were destroyed in 1921.
Ani (Armenian: ; Greek: , Anion; Latin: Abnicum; Turkish: Ani) is a ruined medieval Armenian city now situated in Turkey's province of Kars, next to the closed border with Armenia. Renowned for its splendor, Ani was sacked by the Mongols in 1236. Ani never recovered from a devastating 1319 earthquake, and was gradually abandoned until it was largely forgotten by the 17th century. Some destruction did take place, including most of Marr's excavations and building repairs. 
