The formation of Kartli and its people, the Kartveli (ქართველი) is poorly documented. The infiltration of several ancient, chiefly
Anatolian, tribes into the territory of modern-day Georgia and their fusion with the autochthons played a decisive role in this process. This might have been reflected in the story of
Arian-Kartli, the semi-legendary place of the aboriginal Georgian habitat found in the early medieval chronicle
Conversion of Kartli. During the 3rd century BC, Kartli and its original capital
Mtskheta (succeeded by Tbilisi during the 5th century) formed a nucleus around which the ancient Georgian kingdom known to the Greco-Romans as Hiberia evolved. The role of Kartli as a core ethnic and political unit which would form a basis for the subsequent Georgian unification further increased as a result of its
Christianization early in the 4th century. Located in an area influenced by both the
Byzantine and
Iranian civilizations, Kartli developed a
Christian culture, aided by the fact that it was the only Kartvelian area with its own written language. With the consolidation of
Arab rule in Tbilisi during the 8th century, the political capital of Kartli shifted to its southwest, but the Georgian literati of that time afforded to Kartli a broader meaning to denote all those lands of medieval Georgia that were alike by religion, culture, and language. In one of the most-quoted passages of medieval Georgian literature, the 9th-century writer
Giorgi Merchule asserts: "And Kartli consists of that spacious land in which the
liturgy and all
prayers are said in the Georgian language. But [only] the
Kyrie eleison is said in
Greek, [the phrase] which means in Georgian "Lord, have mercy" or "Lord, be merciful to us". , Duke of Javakheti and Kartli, wearing a
sharbush and a front-opening
qaba with
tiraz, slightly before 1186,
Vardzia, southern Georgia, Inv. No. 5246-262. After the
unification of various Georgian polities into the kingdom of Georgia early during the 11th century, the names "Kartli" and "Kartveli" became a basis of the Georgian
self-designation Sakartvelo. The Georgian
circumfix sa-X-
o is a standard geographic construction designating "the area where X dwell", where X is an
ethnonym. == Medieval subdivision ==