The Duchy of Tskhumi (Georgian: ცხუმის საერისთავო, tskhumis saeristavo) was a medieval administrative-territorial unit in western Georgia. Centered on the coastal city of Tskhumi (the modern-day city of Sukhumi), the duchy functioned as a key political and economic province from the 8th century through the late 14th century.
Historical Development The duchy was originally established as an eristavo (a military-administrative district) within the Kingdom of Abkhazia. Following the unification of the Georgian monarchies in the late 10th and early 11th centuries, it became a constituent province of the unified Kingdom of Georgia. Its location on the Black Sea coast made it a vital center for maritime trade and a strategic defensive point for the Georgian state.
Governance The province was governed by an eristavi (duke), a high-ranking official typically appointed by the reigning monarch. During the 12th and 13th centuries—a period often referred to as the Georgian Golden Age—the duchy flourished under the Bagrationi dynasty. Historical records and Georgian chronicles identify the Shervashidze (also known as Chachba) family as the hereditary governors of the region during the later medieval period.
Transition and Dissolution The authority of the Duchy of Tskhumi began to shift following the Mongol invasions and the subsequent internal fragmentation of the Kingdom of Georgia in the 14th and 15th centuries. As central royal power weakened, the dukes of Tskhumi exerted increasing independence. By the late 15th century, the administrative structure of the duchy was superseded by the formation of the Principality of Abkhazia, with the Shervashidze family establishing themselves as sovereign princes (mtavari). This transition marked the end of the duchy's status as a subordinate administrative division of the unified Georgian crown.