Yedikule Fortress

Run your palm along the wall beside the entrance. The stone is cool, rough, and uneven. Rows of pale limestone sit between thin bands of red brick, like layers in a cake. Above you, gulls call from the direction of the sea. Behind you, a train rattles past. You are standing at the southern end of the old land walls of Istanbul, at a place where an empire's ceremonial gate became a sultan's fortress, and then a prison.

The name tells you what to look for. Yedikule means "Seven Towers" in Turkish. Count them as you walk the courtyard. Some are round, some have many sides, and they do not match. That mismatch is the first clue to this place. The fortress was not built in one go. It was assembled, partly from walls that were already very old when the Ottomans arrived.

To understand that, go back to the early fifth century. The Roman emperor Theodosius the Second built a massive chain of land walls to protect Constantinople, the capital of the eastern Roman world. We often call that world Byzantium. For about a thousand years, these walls held back almost every army that came against them. Here, near the Sea of Marmara, the builders placed the most important gate of all: the Golden Gate.

The Golden Gate was not an ordinary entrance. It was a triumphal arch, faced in white marble. When an emperor returned from a victorious campaign, he entered the city through here and paraded along the main road toward the great palace. Ancient writers describe gilded decoration on the gate, which may explain its name. The gold is long gone. But look closely at the large marble blocks between the two square towers. You are looking at the ceremonial front door of an empire.

Then comes 1453. The Ottoman sultan Mehmed the Second, remembered as Mehmed the Conqueror, took Constantinople after a long siege. A few years later, he ordered a fortress built at this corner of the walls. His builders did something clever and economical. They kept four existing towers of the Theodosian walls, including the two towers of the Golden Gate. Then they added three new towers and linked all seven with high curtain walls. The result is the star-shaped enclosure around you.

Here is a detail many visitors miss. From the inside, you see an Ottoman fortress. From the outside, on the far side of the walls, you can still see the Byzantine Golden Gate itself, now blocked up. The Ottomans did not demolish the old arch. They swallowed it. Two empires sit in the same masonry, one wrapped around the other. If you have time, walk outside the walls afterwards and look back.

At first, the fortress seems to have served as a secure store for the state treasury. That role did not last long. As the sultans built new palaces and new treasuries elsewhere, Yedikule found a darker purpose. It became a prison. Its thick walls, narrow stairs, and small windows made it ideal for keeping important people out of sight and out of reach.

And the prisoners were often surprising. During wars, the Ottoman state sometimes locked up the ambassadors of enemy powers here. A diplomat could arrive in Istanbul as an honoured guest and, when relations collapsed, end up behind these walls. Some prisoners scratched their names, dates, and short messages into the stone. One tower is known in Turkish as the Tower of Inscriptions for exactly this reason. Those carved letters, in several languages, are the voices of people who waited here, sometimes for years.

The most famous event in the fortress is also the grimmest. In 1622, the young sultan Osman the Second was overthrown by rebellious Janissaries, the elite soldiers of the Ottoman army. He was brought to Yedikule and killed here. It was a shocking moment in Ottoman history. A sultan, the shadow of God on earth in official language, died at the hands of his own troops. Stand in the courtyard for a moment and think about how quiet it is now.

Look around the open ground inside the walls. Today it is mostly grass and paths, but it was once a small settlement. There were barracks, houses for the garrison, and a mosque. You can still see the base of a minaret rising from the courtyard. Ruins like this are easy to walk past. But they remind you that a fortress was also a home, with daily routines, meals, and prayers.

If the stairs are open, the towers and wall walks give you wide views. To one side lies the Sea of Marmara, often grey-blue and dotted with waiting ships. To the other, the land walls run north toward the Golden Horn in a long line of towers. Be careful up there. The steps are steep, worn smooth, and railings are few. Take your time, and watch your footing more than the view.

The neighbourhood around you is worth a slow walk. This district, also called Yedikule, has small streets, tea houses, and the old train line along the shore. Just along the walls, you may see vegetable gardens, known locally as bostans. Market gardening beside the walls has a very long tradition in this city. In a sense, people have been growing food in the shadow of these stones for centuries, and some still do.

Before you leave, stand once more near the Golden Gate towers. Notice the light on the marble and the darker brick around it. Listen for the gulls, the traffic, the distant train. Emperors rode through here in triumph. Ambassadors waited here in fear. A sultan died here. And now you are here, on an ordinary day, touching the same stone. As you walk out, glance back at the seven towers. Try to count them again.