Kalbajar District () is one of the 66 districts of Azerbaijan. It is located in the west of the country and belongs to the East Zangezur Economic Region. The district borders the districts of Lachin, Khojaly, Agdam, Tartar, Goranboy, Goygol and Dashkasan districts of Azerbaijan, as well as the Gegharkunik and Vayots Dzor provinces of Armenia. Its capital and largest city is Kalbajar. As of 2020, the district had a nominal population of 94,100. History In Turkic Kalbajar means "Castle on the mouth of the river". The city of Kalbajar was renamed to Karvachar () after its occupation in the First Nagorno-Karabakh war, which corresponds to the ancient district of Vaykunik, one of 12 cantons of Artsakh. It was also known as Upper-Khachen or Tsar (after its chief town) and was ruled by one of the branches of the House of Khachen, who held it until the Russian conquest of the Karabakh region in the early 19th century. In 1992, Azerbaijan abolished the Mardakert District of the Nagorno-Karabakh Autonomous Oblast, and its western part was included in the Kalbajar district. Armenian occupation As a result of the First Nagorno-Karabakh War, the area was occupied by Armenian forces on April 3, 1993. The district was declared a part of the self-proclaimed Republic of Artsakh, although it continued to be recognized by United Nations as a territory of the Republic of Azerbaijan. The Azerbaijani population of Kalbajar were displaced and lived as internally displaced persons in other regions of Azerbaijan. The district was made into the Shahumyan Province, one of the eight regions of NKR. The region remained the least populated of the NKR regions with a total population of 2,800. The town of Kalbajar was home to 500 Armenian residents. Return to Azerbaijan Under the terms of the agreement that ended the 2020 Nagorno-Karabakh War, most of the district (i.e. Kelbajar district within its Soviet time borders) returned to Azerbaijani control. The eastern part of the district, which was part of Martakert Province, remained under the control of the Republic of Artsakh. Initially, the western part was to be returned to Azerbaijani control by 15 November 2020, but this deadline was subsequently extended to 25 November 2020. In the early hours of November 25, Azerbaijani forces entered the region; it was the second region to be returned to Azerbaijan per the ceasefire agreement. Cultural monuments The district has close to 750