The town of Nij (also, Nidzh), located forty kilometers south west of Qabala in Azerbaijan, is the only settlement of Udi people in the world. It has a population of 5,744.
The forefathers of the Udi people were members of one of the twenty six Caucasian Albanian tribes who played an important role in the creation of the state of Caucasian Albania, which was situated in Azerbaijan and in the southern territories of Daghestan (currently in the Russian Federation) in the 4th and 3rd centuries BC.
Ancient Udi was the principal language of Caucasian Albania. The Udi tribe was described in the writings of Herodotus, Strabo and Pliny the Elder. According to these chroniclers, the Udis became politically active following their involvement in the military incursions into Greece of Persian Emperor Xerxes I.
They are the only ethnic minority retaining their affiliation to Christianity in Azerbaijan. The Caucasian Albanian-Udi Apostolic Autocephalous Church is located in Nij. The Udi language is a North Caucasian language. Modern Udis are bilingual in both Udi and the Azeri language.
The settlement of Nij is a unique district, with its unusual planning lay out, transport systems, and its public, private and religious buildings. Nij is also a unique place, as various ethnic and religious groups co-existed throughout the centuries. The settlement of Nij is divided into several quarters, based on the family relationships of its residents. Practically all the names of these quarters are in the Azeri language - such as Hajibayli, Darabag, Daramahla, Vazirli, Farimli, Malbel, Agdamekli, Melikli, Falshyly, Manjyly, Delekli, Chirmakhli and Abdally.
These unique features of the Udis’ cultural heritage have, in the past, been observed by many scholars and travelers who visited Nij. Throughout the 19th century, information about the Udis, and particularly their language, was studied and published by Russian and Western researchers. Alexander Dumas, the French writer, in his book Tales of the Caucasus, provides detailed information about the specific economic activities, language and culture of the Udis living in Nij.