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Walls of Thessaloniki
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The ancient city was organized and evolved within its fortifications which acted not only as the main line of defense against hostile attacks, but also as the conventional boundary between the town and the surrounding agricultural area.
The imposing late 4th century AD fortifications of Thessaloniki incorporated the earlier defense wall dating from the middle of the 3rd century AD, which it used as a buttress. This latter wall had been built hastily, using earlier architectural material, to protect the city from the raids of the Goths. The new walls had the shape of a trapezium and were about 8 km long. In the lower, more vulnerable section of the city, they were strengthened by an outwork and had stout triangular bulwarks placed at frequent intervals. Towers were built on the slopes of the hill, most of them rectangular. Triangular bulwarks alternated with rectangular towers at the most sensitive within it points of the Acropolis. On the side facing the sea, the city was protected by the sea wall, which also incorporated architectural members taken from the late Roman buildings in the Agora, probably for use in repairs made after the earthquakes of 620-630. This wall was low, and its outer face stood in the sea, and during the siege of Thessaloniki by the Saracens in 904, the general Petronios therefore planned to construct a submarine barrier by throwing sarcophagi and funerary stelai into the sea in front of the sea wall. The plan was not brought to completion, however, and the Saracens entered the city from the sea. The sea wall was later reinforced, before the siege of Thessaloniki by the Normans. 
At the south-west end of the sea wall was the large artificial harbor that was constructed by Constantine during his stay in Thessaloniki (322-323). The harbor was protected by a breakwater, referred to as molos in the 7th century and later as the tzeremboulo. There was a second, natural harbor called Kellarion on the east coast of the Thermaic Gulf. 
The Acropolis was appended to the exterior of the north-east section of the enceinte, and followed the general arrangement of the fortifications in the lower city, with alternating rectangular towers and defensive triangular bulwarks at its most vulnerable points. Evidence that the Acropolis was a later addition is furnished by the orientation of the towers on the dividing wall: these faced the interior of the Acropolis on what was originally the outer face of the city fortification wall. Inside the Acropolis there is a large cistern in the south-east section which was used for the city's water supply. On the north edge of the perimeter wall is the Fortress of the Heptapyrgion, to the south of which an Early Christian basilica has been excavated. 
The city has four main entrances: two Gates in each of the east and west walls, set at the ends of the two parallel main streets. The entrance to Thessaloniki from the west was via the Golden Gate, from which ran the main street of the city, the Via Regia of the Roman period, called Leophoros by the Byzantines, which lies beneath the modern Egnatia Street. The second gate at the west was the Letaia Gate, standing on the western extension of the modern Ayiou Dimitriou Street, beneath which ran a second ancient artery. In the east wall we know of the Cassandreia Gate (later the Kalamaria Gate) to which the Leophoros led, the New Golden Gate at the east end of Ayiou Dimitriou Street, and two other gates, the Asomatoi Gate and the Rome Gate. Smaller gates in the north wall of the city mainly served military needs. The Acropolis communicated with the city through a large gateway in the dividing wall, according to the Byzantine authors. Finally, there were two smaller gates in the Acropolis enceinte, communicating with the countryside. 
Large towers and forts acted as nodal points in the perimeter of the walls. Their present form is the outcome of major works undertaken by the Turks after the capture of the city to strengthen its fortifications and adapt them to the new requirements of artillery warfare. At the east end of the sea wall, where it joins the east wall, stands the White Tower, probably on the site of the 'eastern tower by the sea' mentioned by Byzantine authors.
Sultan Suleiman the Magnificent (1520-1566) built the Vardari Fort at the south-west edge of the enceinte, to protect the west side of the harbor. The east section of the perimeter wall of this fortress incorporated part of the west wall of the Early Christian period. At the north end of the east wall is the Chain Tower. In the 15th century this tower replaced the Byzantine Trigonion Tower, which was incorporated in its structure; before the eighteenth century, it was used as a gunpowder magazine and arsenal. 
At the end of the 19th century, the sea wall began gradually to be demolished, followed by large sections of the land walls in the lower, flat area of the city. The surviving fortifications, however, a length of almost 4 km, including the Acropolis and the Heptapyrgion, form an imposing complex. The line of the sea wall is being uncovered by excavations.

 Page under construction 
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Τείχεσιν ἀρρήκτοις Ὁρμίσδας ἐξετέλεσσε τήνδε πόλιν [μεγάλην χεῖρας ἔχων καθαράς]

 With unsoiled hands Hormisdas built these impregnable walls and made the city great


Inscription from the Sea Walls from the reigns of Leo VI and Alexander (886-912)

​At the Museum of Byzantine Culture in Thessaloniki


+ Ἀνεκαινίσθη ἐπὶ Λέοντος καὶ Ἀλεξάνδρου τῶν αὐταδέλφων καὶ αύτοκρατόρων καὶ φιλοχρίστων ἡμών βασιλέων καὶ ἐπὶ Νικολάου τοῦ οἰκουμενικοῦ ἡμών πατριάρχου +

+ Ἀνεκαινίσθη ἐπὶ Λέοντος βασιλικοῦ πρωτοσπαθαρίου καὶ στρατιγ στρατιγώ Θεσσαλονίκης τοῦ Χιτζιλάκη, καὶ ἐπὶ  Ἰωάννου ἀρχιεπισκόπου Θεσσαλονίκης τοῦ ἐντοπίου.

Renewed under Leo and Alexander, his brother, our autocratic and Christ-loving ruler, and under Nicholas, our ecumenical patriarch.

Renewed under Leo Chitzilakis, royal protospatharios and strategos of Thessaloniki, and under John, Archbishop of Thessaloniki. 

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+ Πύργος τοῦ πανσεβάστου σεβαστοῦ κὲ μεγάλου χαρτουλαρήου κῆρ Ἀνδρονίκου τοῦ Λαπαρδᾶ

Tower of the most reverend grand chartophylax Andronikos Lapardas


…ος κὲ δο(ῦ)λος τοῦ Λαπαρδᾶ Μηχαὴλ [….]οχ

…and servant of Lapardas, Michael [Prosouch?]

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Ἀνγέρθη {η} ἡ παροῦσα πύλη ὁρισμῷ τῆς κραταιᾶς καὶ ἁγιας ἡμ(ῶν) κυρίας καὶ δεσποίνης κυρᾶς Ἄννης τῆς Παλαιολογίνης, ύπηρετήσαντος καστρ[ο]φύλακος  Ἰω(άνν)ου  Χαμαετ(οῦ) [τ]οῦ κοια[ίστορος τ]ῷ ςω ξ[δ᾿ ἔτει] ἰνδικτιῶνι θ´


This gate was built by the orders of the powerful and holy mistress and ruler, Lady Anna Palaiologina, when the quaestor John Chamaetos was guardian of the fortress, in the year 6864 (1355-1356) of the 9th indiction.


Σθένι Μανουὴλ τοῦ κρατίστου δεσπότου

Ἤγειρε τόνδε πύργον αὐτῷ τειχίῳ

Γεώργιος δούξ Ἀπόκαυκος ἐκ βάθρων

Σθένει Μανουὴλ του κρατίστου


By the strength of Manuel, our mighty Despot, this tower was erected from the foundations with this wall by duke Georgios Apokaukos. By the strength of Manuel the mighty.

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Inscription of Çavuş Bey at Heptapyrgion

Murad the son of Mehmed Khan conquered and took by force this Fortress through the help of God, his support and his might - the Sultan of the Sultans of the Arabs and non-Arabs, the one who humbles the enemies of God, Sultan Murad, son of Sultan Mehmed, may victories over his enemies never stop - from the hands of the Franks and the Christians. And he killed some of them, and he captured some of them and their children and their belongings. And after a year had passed he built and raised this tower through the hands of the King of the Emirs and Nobles Çavuş Beğ, in the blessed month of Ramadan in the year 834 [1431]

Translated by Lowry

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Walls of Thessaloniki.jpg
Sea Wall of Thessaloniki by Abdullah Fre

Sea Wall of Thessaloniki by Abdullah Freres (1860s)

Golden Gate or Axios (Vardar) Gate  from

Golden Gate or Axios (Vardar) Gate from Cousinéry (1831)

Conscripts of the Ottoman army exit New

Conscripts of the Ottoman army exit New (Litaia) Gate (1876)

From T.G. Jackson (1923).jpg

From T.G. Jackson (1923)

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Rising at the northern-most point of the Acropolis, the Heptapyrgion owes its name to the seven towers of which it consists. Its Turkish name, Yedi Kule, has the same meaning, just as the corresponding fortress in Istanbul, located at the Golden Gate.

It is the product of the remodeling of a pre-existing Byzantine fort, carried out in 1431, immediately after the capture of the city by the Turks. This is attested by a Turkish inscription above the main entrance tower, which has an interesting facade incorporating Byzantine sculptures in second use. The inscription refers to the capture of Thessaloniki by the Turks: "This Acropolis was conquered and captured by force, from the hands of the infidels and Franks, with the help of God, by Sultan Murad, son of Sultan Mehmet, whose banner God does not cease to make victorious. And he slaughtered and took prisoner some of their sons, and took their property. And about one month later, this tower was built and founded by Çavuş Bey, king of emirs and the great, in the month of Ramadan, in the year 834 (= 1431)." The Çavuş Bey referred to was the first Turkish governor of Thessaloniki.

It is a polygonal fortress formed on the north-east edge of the Acropolis by the addition of an almost semicircular wall to the enceinte at this point, on the inside of the Acropolis. The southern part of the fortress that was added to the existing north wall of the Acropolis has a symmetry of design and execution that links it with the original layout of the closed fortress, which is probably to be attributed to the Late Byzantine period. By contrast, the north part of the enclosure wall, which results from the incorporation in the fortress of part of the earlier wall of the Acropolis, exhibits some variety in its dimensions and in the form of its towers. The wall between the towers is crenellated and, inside the fortress, forms a passageway to facilitate communication between the towers.

During the Ottoman Era, the Heptapyrgion was used as the seat of the Turkish governor. At the end of the 19th century, a prison was established in the fortress. A variety of buildings was erected to serve the needs of the prison, both inside the monument and outside its south front, which was completely concealed by them.

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Heptapyrgion (1907)

Trigonion Tower
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White Tower
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Fortress of Vardari
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Map of Thessaloniki (18th century)

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From Henri Laurent (1889)


Abbé Hamard (1890)

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Photo of two women posing by the Walls of Thessaloniki by Ruby Peterkin (c. 1916)

Before 1919.jpg

Before 1919

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Charles Martel (1919)


“View of Thessaloniki” by Kohlmann (1944)

American School of Classical Studies at

American School of Classical Studies at Athens
Homer A. Thompson Photographic Collection



Byzantine Architecture by Cyril Mango

Architecture in the Balkans from Diocletian to Süleyman the Magnificent by Slobodan Ćurčić

Early Christian and Byzantine Architecture by ​Richard Krautheimer 

Wandering in Byzantine Thessaloniki by Tourta and Kourkoutidou-Nikolaidou

Oxford Dictionary of Byzantium edited by Alexander Kazhdan

“Les inscriptions byzantines de Thessalonique” by Jean-Michel Spieser


Walls of Thessaloniki Album (Byzantine Legacy Flickr)

Thessaloniki Album (Byzantine Legacy Flickr)

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