The contemporary Azerbaijani statehood takes its roots back from the Kingdom of Caucasian Albania. The area presently known as Nagorno-Karabakh (Mountainous Karabakh) was part of that Kingdom since its formation. According to Antic sources there were 26 tribal unions in Albania, ethnic composition of which was autochthonous Caucasian and Turkic. Albania with its autocephalous church possessed a rich and unique culture, where alphabet in use was composed of 52 letters. In a year 313 A.D. Christianity was confirmed as a state religion in Albania. Turbulent situation did not let it to keep its independence for a long time. In a year 705 A.D. the Kingdom was totally subordinated to the Arab Khalifat. After this, the Khalifat having an alliance with Armenians against Byzantium, with the aim of elimination of the close relations between Albania and Byzantium, subjugated Albanian Church to the Armenian Grigorian Church. Throughout the Middle Ages, Karabakh always was part of the state formations existed in the territory of present Azerbaijan led by Turkic Muslim dynasties and inhabited by Turkic speaking people. 18th century was marked with an establishment of the Karabakh Khanate, which was headed by the Turkic (Azerbaijani) dynasty of Djavanshirs. This was the Azerbaijani Khanate ruled by the hereditary dynastic tradition of Azerbaijani nobles, predominantly populated by ethnic Azerbaijanis. A rule of Russian Empire was imposed on the Khanate after the signature of the Treaty of Kurakchay (1805) between the Khan of Karabakh and the Russian Empire. After the take-over of the overall Caucasian region, the Russian Empire pursued divide et impera policy through different means with a view to establishing and strengthening its total control. Enforced change of demographic situation in the region by massive resettlement of Armenians to Karabakh from Persia and Ottoman Empire was an extensive package of measures of such kind. After the Russo-Iranian (1806-1813, 1826-1828) and Russo-Ottoman (1828-1829) wars the ethnic composition of the region was substantially changed. Only during the period of 1828-1830 more than 40.000 Armenians from Persia and 84.600 from Ottoman Empire were settled to Azerbaijan. In a year 1828, by the order of the Russian Emperor, an Armenian Oblast was formed in the territories of occupied Azerbaijani Khanates (Irevan and Nakhchivan). This was done with the aim of creating a buffer zone in the backyard of the Ottoman Empire and to divide the Turkic speaking band into separate parts. Abolition of the Albanian Church by the Russian Czar in 1836 resulted in ultimate Grigorianization (Armenization) of the Albanian population.