the city in the late 4th century. In 542 the Romans evacuated the town and demolished its citadel to prevent it from being captured by Sasanian Empire. In 565, however, the emperor Justinian I restored the fort and Sebastopolis continued to remain one of the Byzantine strongholds in Colchis until being sacked by the Arab conqueror Marwan II in 736. Afterwards, the town came to be known as Tskhumi. Restored by the kings of Abkhazia from the Arab devastation, it particularly flourished during the Georgian Golden Age in the 12th–13th centuries, when Tskhumi became a center of traffic with the European maritime powers, particularly with the Republic of Genoa. Early in the 14th century the Genoese established their short-lived trading factory in Tskhumi and a Catholic bishopric existed there which is now a titular see. The city of Tskhumi became the summer residence of the Georgian kings. According to Russian scholar V. Sizov, it became an important “cultural and administrative center of the Georgian state. A Later Tskhumi served as capital of the Odishi — Megrelian rulers, it was in this city that Vamek I ( 1384–1396), the most influential Dadiani, minted his coins. Documents of the 15th century clearly distinguished Tskhumi from Principality of Abkhazia. The Ottoman navy occupied the town in 1451, but for a short time. Later contested between the princes of Abkhazia and Mingrelia, Tskhumi finally fell to the Turks in the 1570s. The new masters heavily fortified the town and called it Sohumkale, with kale meaning "fort" but the first part of the name of disputed origin. It may represent Turkish su, "water", and kum, "sand", but is more likely to be an alteration of its earlier Georgian name. At the request of the pro-Russian Abkhazian prince, the town was stormed by the Russian Marines in 1810 and turned, subsequently, into a major outpost in the North West Caucasus. (See Russian conquest of the Caucasus). Sukhumi was declared the seaport in 1847 and was directly annexed to the Russian Empire after the ruling Shervashidze princely dynasty was ousted by the Russian authorities in 1864. During the Russo-Turkish War, 1877–1878, the town was temporarily controlled by the Ottoman forces and Abkhaz-Adyghe rebels. After its annexation, Sukhumi became the administrative center of the Sukhumi Okrug of the Kutais Governorate. Following the Russian Revolution of 1917, the town and Abkhazia in general were engulfed in the chaos of