Anastasiopolis-Peritheorion is an archaeological site located in northern Greece, southeast of the village of Amaxades in the Rhodope regional unit in Western Thrace.

The city is located in a fertile area north of Lake Vistonida, through which it was originally connected to the Aegean Sea.

[2] After him, according to Prokopios, under Justinian I (r. 527–565), a coastal wall facing the sea and an aqueduct that transported water from the Rhodope Mountains to the city was built.

In this regard, it is also significant that he mentions Justinian's aqueduct, but not the barrier wall between the city and the Rhodope Mountains (see below under ruins), which could therefore have existed before.

[8] At the same time, the place seems to have had a certain economic importance in the 11th and 12th centuries, as it is mentioned in several treaties between the Republic of Venice and the Byzantine Empire.

[5] In 1203 Tsar Kaloyan of Bulgaria invaded Thrace, destroyed Peritheorion and various other cities in the region, and dragged their inhabitants to the banks of the Danube.

The city was also involved in the Byzantine civil war of 1341–1347: in 1342 John VI Kantakouzenos besieged Peritheorion in vain, where his domestic opponents were staying.

On July 7, 1345, John V and Umur won a decisive victory over the robber baron Momchil, who had established a quasi-independent rule in the Rhodope Mountains in the battle of Peritheorion in front of the city walls.

[5] Shortly after the rise of the Ottoman Sultan Murad II, in 1421 at the latest, Peritheorion was under his control and was given away by the ruler to his Genoese ally, Giovanni Adorno.

City gates have been documented to the northwest and southeast, as well as eight predominantly rectangular, but partly also round, wall towers in the east.

In the brickwork of some towers, monograms of the imperial family of the Palaiologoi have been preserved by means of integrated bricks, which can be dated to around 1341 and thus attest at least to construction work in this phase.

[10] Presumably, all of the fortification measures mentioned served together to secure the narrowing of the coastal plain between the Rhodope Mountains and the Aegean coast with a barrage at this point, for example to facilitate defense in the event of enemy incursions.

[11] Despite the overgrowth of the entire city area as well as the wall to the Rhodope Mountains, at least one circular path is kept free, which leads to the ruins.