Doubts About the Earliest Wall

Some historians believe the account of an early city wall around Byzantium may be just a legend. It might have been based only on guesses, especially the idea that the Arch of Urbicius and the Arch of the Milion once marked the gates in an ancient wall. These structures could have given later writers the impression of an earlier, larger defense system.

However, it is very likely that early Byzantium was much smaller than it became later in history. In that case, the arches could indeed show where the first walls built outside the Acropolis once stood. This means the story may hold some truth, though it might not be entirely accurate Sofia Daily Tours.

The Third Line of Walls

We now move to the third and most significant set of walls that protected ancient Byzantium. These walls were responsible for making the city one of the greatest fortresses in the ancient world. According to historical sources, these walls enclosed a circuit of thirty-five stadia (about 6.5 kilometers), which included most of the land occupied by the First and Second Hills of the city.

Ports Along the Golden Horn

The walls ran along the Golden Horn, starting from the tip of the promontory and reaching the west side of the bay. This area is where the valley between the Second and Third Hills—now known as the Valley of the Grand Bazaar—meets the water.

This bay was a key center of trade and activity. It had three ports, which were either natural or man-made. These served the busy shipping industry of Byzantium. One of the best-known ports was at the Neorion, near today’s Bâğçe Kapısı.

Strong and Advanced Fortifications

The walls were famous in ancient times for their great strength. Builders used large, squared blocks of hard stone that were carefully fitted together. Metal clamps held the stones in place, making the walls so solid that they seemed like a continuous rock formation.

One of the towers was called the Tower of Hercules, named for its impressive size and durability. Seven other towers were believed to be so finely built that they could echo even the quietest sound, alerting soldiers to enemy movements and preventing surprise attacks.

Built After Victory Over the Persians?

The style of the construction suggests that these walls were likely built soon after Pausanias, the Greek general, defeated the Persians at Plataea and later drove them out of Byzantium. This period marks the beginning of Byzantium’s rise as a major defensive stronghold in the ancient world.