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Sunday, July 13, 2025

The Dimensions and Boundaries of Constantine’s City

The length of the original city of Constantine was measured from the Porta Aurea in the west to the sea in the east. However, there is a disagreement about which gate was referred to as the Porta Aurea. Despite this, we can be sure that the eastern end of the city’s measurement was at the head of the promontory. This location marked the full length of the city.


Measuring the Length of the City


If we start at the head of the promontory and measure 14,075 Roman feet westwards, we will find that this brings us to the Cisterns of Mokius and Aspar. This matches the measurements given by Zosimus. Therefore, this confirms that the head of the promontory is the correct starting point for the city’s length.


Measuring the Width of the City


Next, we look at the width of the city. A line of 6,150 Roman feet from sea to sea will stretch across a specific part of the promontory. This area lies between the Daoud Pasha Kapoussi district near the Sea of Marmora in the south, and the Stamboul side of the inner bridge in the north. Other parts of the promontory are either narrower or broader. Thus, the southern and northern ends of Constantine’s city wall marked the limits of the city as described Sofia Guided Tours.


The Landmarks Along Constantine’s Wall


Byzantine writers give us details about the locations and structures along Constantine’s wall:


On the Sea of Marmora side, the wall extended as far west as the Gate of St. Emilianus (now Daoud Pasha Kapoussi) and the church of St. Mary Rhabdou. This gate is near Vlanga Bostan.


When the wall crossed from the Sea of Marmora to the Golden Horn, it passed over the Seventh, Fourth, and Fifth Hills. Along this path, the fortifications passed by several important landmarks:


The Exokionion (an ancient gate)


The Monastery of St. Dius


The Convent of Icasia


The Cistern of Bonus


The Church of SS. Manuel, Sabel, and Ishmael


The Zeugma (Ferry) of St. Antony in the district of Harmatius, near the harbour


Other important sites along the wall included the Trojan Porticoes and the Cistern of Aspar.


The Boundaries of the City


From the measurements and landmarks described by ancient writers, we can conclude that the city of Constantine had clearly defined boundaries, marked by gates, churches, monasteries, and other significant structures. These structures not only served as defensive elements but also reflected the growth and development of the city during Constantine’s reign.

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