Georgia is a transcontinental country in the Caucasus region of Eurasia. Located at the crossroads of Western Asia and Eastern Europe, it is bounded to the west by the Black Sea, to the north by Russia, to the east by Azerbaijan, and to the south by Armenia and Turkey. The capital and largest city is Tbilisi. Georgia covers a territory of 69,700 square kilometres (26,911 sq mi), and its approximate population is about 3.718 million. Georgia is a unitary parliamentary republic, with the government elected through a representative democracy.
During the classical era, several independent kingdoms became established in what is now Georgia, such as Colchis and Iberia. The Georgians officially adopted Christianity in the early 4th century. The Georgian Orthodox Church had enormous importance for the spiritual and political unification of early Georgian states. The unified Kingdom of Georgia reached its Golden Age during the reign of King David the Builder and Queen Tamar the Great in the 12th and early 13th centuries. Thereafter, the kingdom declined and eventually disintegrated under the hegemony of various regional powers, including the Mongols, the Ottoman Empire and successive dynasties of Iran. In the late 18th century, the eastern Georgian Kingdom of Kartli-Kakheti forged an alliance with the Russian Empire, which directly annexed the kingdom in 1801 and conquered the western Kingdom of Imereti in 1810. Russian rule over Georgia was eventually acknowledged in various peace treaties with Iran and the Ottomans and the remaining Georgian territories were absorbed by the Russian Empire in a piecemeal fashion through the course of the 19th century.