Tbilisi, formerly known as Tiflis, is the capital and the largest city of Georgia, lying on the banks of the Mtkvari River with a population of roughly 1.5 million inhabitants. Founded in the 5th century by the monarch of Georgia's ancient precursor Kingdom of Iberia, Tbilisi has since served, with intermissions, as the Georgian capital. Formerly, the city had also served as the seat of the Imperial administration of the Caucasus during the Russian rule from 1801 to 1917, the capital of the short-lived Transcaucasian Democratic Federative Republic in 1918, of the Democratic Republic of Georgia from 1918 to 1921, of the Georgian Soviet Socialist Republic from 1921 to 1991, and the Transcaucasian Socialist Federative Soviet Republic from 1922 to 1936.
Located on the southeastern edge of Europe, Tbilisi's proximity to lucrative east-west trade routes often made the city a point of contention between various rival empires throughout history and the city's location to this day ensures its position as an important transit route for global energy and trade projects. Tbilisi's varied history is reflected in its architecture, which is a mix of medieval, classical, and Soviet structures.
Historically, Tbilisi has been home to people of diverse cultural, ethnic, and religious backgrounds, though it is overwhelmingly Eastern Orthodox Christian. Notable tourist destinations include cathedrals like Sameba and Sioni, classical Freedom Square and Rustaveli Avenue, medieval Narikala Fortress, pseudo-Moorish Opera Theater, and the Georgian National Museum.