Thus was the bank of the Danube and its neighbourhood fortified in Mysia.[78] I shall now proceed to Scythia, where the first fort is that named after St. Cyrillus, the ruinous parts of which were most carefully rebuilt by the Emperor Justinian. Beyond this was an ancient fortress named Ulmiton, but as the Sclavonian barbarians had for a long time infested that region, and made their habitation there, it had become quite deserted, and nothing remained of it except its name. He therefore rebuilt it from its foundations, and rendered that part of the country safe from the attacks of the Sclavonians. Next to this is the city of Ibida, whose walls had become very ruinous, but which he, without any delay, rebuilt and rendered very strong. He built a new fort beyond it named Ægistum, and restored another fort in the furthest part of Scythia named Almyris, whose walls had for the greater part fallen into decay, as he did to all the other fortifications in this part of Europe. VIII. I have described above the buildings constructed by the Emperor Justinian among the Dardanians, Epirotes, Macedonians, and the other tribes of the Illyrians, as well as those in Greece and along the river Ister. Let us now proceed to Thrace, taking as the best foundation for our narrative the neighbourhood of Byzantium, since that city surpasses all others in Thrace, both in strength and situation, for it overhangs Europe like a citadel, and guards also the sea which divides it from Asia. I have described above his works, both churches and other buildings, within and without the walls of Constantinople; I am now about to speak of what lies beyond them.