He also built a fort in Lazica, named Losorium, and fortified the passes in that country, which are named the Clisuræ, in order to shut out the enemy from the country of the Lazi.[67] He also restored an ancient and ruinous church of the Christian Lazi, and founded a noble city, named Petra,[68] which the Lazi by their own negligence allowed to fall into the hands of the Persians, when Chosroes came thither with a great army; but the Romans conquered the Persians in battle, killed some of them, took the rest prisoners, and razed the city to the ground, that the Persians might not be able to return thither and do any more mischief—all of which has been described in my ‘History of the Wars’—where also is a description of how, on the Continent opposite the territory of the Lazi, as one goes towards the Mæotic Lake,[69] the Romans destroyed two forts, named Sebastopolis[70] and Pityous, because they heard that Chosroes meditated sending an army to occupy them. Now, however, the Emperor Justinian entirely rebuilt Sebastopolis, which before was only a small fort, making it impregnable by the strength of its walls and other defences, and ornamenting it with streets and buildings, so as to render it one of the first of cities, both for size and beauty. Moreover, finding that the walls of the cities of Bosporus and Cherson, which are situated upon the sea-shore in that region, beyond the Mæotic Lake and the Tauri and the Tauroscythi, on the frontier of the Roman Empire, had quite fallen into ruin, he restored them to a condition of great beauty and strength. In the same region he built the fort of Alustus, and one in the country of the Gorzubiti. He especially strengthened the fortifications of Bosporus, which, in ancient times, had fallen into the power of the barbarians, and which he captured from the Huns and annexed to the Roman Empire. There is here a country by the sea-shore, named Doru, which has been long inhabited by those Goths, who would not follow Theoderic on his expedition to Italy, but of their own accord remained there, and have been in alliance with the Romans down to my own time, joining the Roman armies when they march against the enemy, at the pleasure of the Emperor; their numbers are about three thousand; they are excellent warriors, industrious husbandmen, and most hospitable to strangers. Their country, Doru, is situated on high ground, yet is not rough or sterile, but good soil, producing the best of crops. The Emperor built no city or fort anywhere in this country, as its inhabitants cannot endure to be confined within walls, but love to dwell in the open country. He did, however, fortify with long walls the passes by which an enemy could enter the country, and thus freed the Goths from foreign invasion. These were his works in this quarter.