Khachen () or Seyidbeyli () is a village in the region of Nagorno-Karabakh, Azerbaijan. Until 2023 it was controlled by the breakaway Republic of Artsakh. The village had an ethnic Armenian-majority population until the expulsion of the Armenian population of Nagorno-Karabakh by Azerbaijan following the 2023 Azerbaijani offensive in Nagorno-Karabakh.
Toponymy The village was known as Seyidishen () during the Soviet period.
During the Soviet period, the village was a part of the Askeran District of the Nagorno-Karabakh Autonomous Oblast.
Historical heritage sites Historical heritage sites in and around the village include the 12th/13th-century fortress of Kachaghakaberd in the mountains to the west, a 12th/13th-century khachkar, the 13th-century St. Stephen's Church (), the 13th/14th-century monastery of Ptkes Berk (), an 18th-century village, and the 19th-century St. John's Church ().
Economy and culture The population was mainly engaged in agriculture and animal husbandry as of 2015, when the village had a municipal building, a house of culture, a secondary school, a kindergarten and a medical centre. The community of Khachen includes the village of Urakhach.
Demographics The village had 369 inhabitants in 2005, and 332 inhabitants in 2015.
As of January 2026, 69 Azerbaijani families, totaling 250 individuals, have been resettled in the village by Azerbaijan.
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