„Dorustorum-Drastar-Silistra" National architectural reserve

The Roman city Dorostorum appears over an older Thracian settlement from the first millennium BC. In 105/106, the XI Claudius Legion is quartered here, as it remains in Dorustorum till the end of Antiquity. The city was also station of the Danube fleet.
Currently, there are exhibits of the following sites:
Roman city villa of ІІ-ІV century: In the eastern part of the city of Silistra the remains of a large city villa are located, built near the ancient Dorustorum, inhabited by wealthy aristocratic family.
Episcopal Palace and Basilica from the end of IV-VI century: on the ruins of the Roman villa an imposing massive public building was built with official hall, supplemented with apse and side rooms. Next to it, a large episcopal basilica of the IV-th century is revealed with a length of 30 m. It is assumed that this is the palace of the Dorostolski bishops.
North wall IV-VI, VIII-XVI century: In the sixth century a massive fortified wall was built, which was restored and used without interruption from IX to XV century. In front of it was the port of the late ancient and medieval town. A stone wall, made of large squared rocks, cemented with fine pink mortar mixed with crushed building ceramics is discovered there.
Episcopal and patriarchal basilica IX - XIV century: A temple was built next to the fortress in the second half of the century. Perhaps it was the cathedral church of the first bishop of Drastar (Nicholas Bishop) after the Christianization. After 927, when Drastar became the residence of the first Bulgarian Patriarch Damian, the church was converted into a cross basilica.
Angular pentagonal tower VI-XIV century and Patriarchal residence X century:The palace of Drastar bishops and patriarchs is in the west of the cathedral of medieval Drastar. It was built up to the massive and with an impressive size north-west pentagonal tower of the fortress. The residence is surrounded by a paved courtyard next to which are built massive chain rooms, halls, cells, etc.
Turkish quay wall XVI-XVII century: During the Ottoman era /probably XVI century/ the eastern part of the residence was totally destroyed and at its place a port for galleys was built,  from which the massive west quay wall is preserved.
Southern Wall of Dorustorum-Silistra early IV century, restored in the early VI – XIV century: This is one of the most powerful military defense facilities in Bulgaria from the Late Antiquity and Middle Ages. The fortress was built under Emperor Constantine the Great to stand against the Goths and Huns. It was restored under Emperor Justinian the Great. There is a large pentagonal tower In front of the wall  and the central port of the late ancient city in the western part.
Location: Bulgaria,Silistra district, Silistra Municipality, city of Silistra