The Towers and the Wall of Blachernae

Impressive Towers on Marshy Ground

The Wall of Blachernae was strengthened by three large hexagonal towers, some of the finest along the circuit of Constantinople’s fortifications. These towers were partly built of brick at their upper levels, possibly to reduce weight. As Dr. Paspates suggested, this was important because the ground in the area was marshy, and lighter construction helped prevent damage or collapse.

The southernmost tower, which still stands and can be safely examined, gives us a clear idea of their structure. Inside, it measured about 32½ feet by 19 feet, and it once had three separate stories. This made the tower not only a strong defensive structure but also a commanding viewpoint over the surrounding land Rose Festival Tour.

On the face of this tower, an inscription in marble letters survives. It was dedicated to an emperor named Michael, most likely Michael II (820–829), who ruled during a troubled period of Byzantine history. Such inscriptions were common, as they reminded people of the ruler who had invested in the city’s defenses.

The Gate of Blachernae

Between the first and second towers stood an important entrance known as the Gate of Blachernae. It was named after the Blachernae quarter, the district it served. This gate allowed direct access to the church and surrounding settlement. For centuries, it was a key entrance to this northern section of Constantinople, linking the sacred church precinct with the rest of the city.

Was the Wall of Heraclius Larger?

Historians once believed that the Wall of Heraclius included not only this section but also the entire stretch of fortifications from the Kerko Porta to the Golden Horn. However, evidence shows this was unlikely.

The main reason is the purpose of the wall. It was specifically described as being built to bring the Church of Blachernae inside the city’s defenses. This description fits perfectly with a shorter wall running from the Sixth Hill to the Golden Horn, but it does not match the idea of a long wall stretching all the way from the Kerko Porta.

Natural Defenses of the Area

Another reason a longer wall was unnecessary is the natural protection already present. On the south side, the church was shielded by the acropolis on the western spur of the Sixth Hill. This made it safe from attack in that direction. The only vulnerable area was the open plain to the west, and that was exactly where Heraclius ordered a wall to be built.

Later Additions and Misunderstandings

Much of the fortification once attributed to Heraclius actually belongs to later rulers. Large sections were the work of Manuel I Komnenos in the 12th century, while other parts originally formed the defenses of the Fourteenth Region of the city. Over time, these layers of construction created confusion about who built what.

What remains clear, however, is that the Wall of Heraclius, with its three striking hexagonal towers and the Gate of Blachernae, was primarily designed to protect the holy sanctuary of the Virgin at Blachernae, one of the most venerated sites in Constantinople.