The Kingdom of Kartli (Georgian: ქართლის სამეფო, romanized: kartlis samepo) was a late medieval/early modern monarchy in eastern Georgia, centred on the province of Kartli, with its capital at Tbilisi. It emerged in the process of a tripartite division of the Kingdom of Georgia in 1478 and existed, with several brief intervals, until 1762 when Kartli and the neighbouring Georgian kingdom of Kakheti were merged through dynastic succession under the Kakhetian branch of the Bagrationi dynasty. Through much of this period, the kingdom was a vassal of the successive dynasties of Iran, but enjoyed intermittent periods of greater independence, especially after 1747.