This work investigates the historical, spiritual, and architectural evolution of Constantinople as the symbolic and political center of the Byzantine Empire. Philip Sherrard, a scholar of Greek culture and theology, utilizes historical documentation and architectural analysis to argue that the city functioned as a physical manifestation of the Christian cosmos. He examines how the city's geography and urban planning reflected the intersection of imperial power and religious orthodoxy over the centuries.

Scholars and readers often note the lyrical, philosophical quality of Sherrard's prose, which elevates the text beyond a standard historical survey. It is frequently cited as a foundational resource for those interested in the intersection of Byzantine art, theology, and urban identity.