Gulluja is a village in the Aghbaba area (nahiya) of the Kars uezd of the former Kars province, later in the former Amasiya (Aghbaba) district, and currently in the Shirak province. The provincial centre is located 45 km to the northwest of the town of Gumru, on the northern shore of Lake Arpa, at a height of 2,060 m above sea level. It was marked in “The Iravan Province Review Book”, on the five-verst map of the Caucasus.

The main inhabitants of the village were Azerbaijanis. In their works Armenian authors mention the Garapapags residing in the village. The Garapapaks are one of the Turkic tribes taking part in the formation of Azerbaijanis. The village was solely inhabited by Azerbaijanis – 193 in 1886, 288 in 1897, 324 in 1908 and 378 Azerbaijanis in 1914. The village was part of the Southwest Caucasian Republic established in Kars in 1918–1919. In February 1920, as a result of the attack of Armenian armed forces, the village was destroyed and the population moved to the Kars province. After the Treaty of Kars in 1921, some inhabitants returned to the village. The village was inhabited by 517 Azerbaijanis in 1922, 553 in 1926, 576 in 1931, 624 in 1939, 594 in 1959, and 985 Azerbaijanis in 1979. In January 1989 the Armenian government deported the villagers from their historical and ethnic land. At present, the Armenians moved from the Akhilkalak and Bogdanovka (Ninosminda) districts of Georgia live in the village.

The toponym is formed by adding the adjective-building suffix “-lu” and the suffix “-cə” to the word “gul” (flower).

By the decree of the Presidium of the Supreme Soviet of the Armenian SSR dated 3 April 1991, the village was renamed “Tsakhkut”. According to the law “On the administrative-territorial division of the Republic of Armenia” dated 7 November 1995, it was integrated into the administrative territory of the Shirak district.

Geographical coordinates: latitude: 41°05’ N., longitude: 43°36’ E.