For a thousand years an extraordinary empire made possible Europe’s transition to the modern world: Byzantium. An audacious and resilient but now little known society, it combined orthodox Christianity with paganism, classical Greek learning with Roman power, to produce a great and creative civilization which for centuries held in check the armies of Islam. Judith Herrin’s concise and compelling book replaces the standard chronological approach of most histories of Byzantium.

Instead, eac...