The author provides a detailed archaeological and historical survey of Constantinople's fortifications and adjacent monuments, tracing the city's site, imperial structures, and successive city walls; chapters analyze construction and repairs, principal gates and towers (including the Golden Gate and the Tower of Anemas), palatial remains, seaward defenses and harbors, and outer works such as the Anastasian Wall. The narrative combines field observations, plans, inscriptions, and contemporary maps with close readings of primary sources to identify sites, evaluate disputed attributions, and highlight where excavation would clarify open questions; numerous illustrations and plans accompany the text to aid spatial understanding.