From the accession of Alexius in 1081, through the disastrous Fourth Crusade - when an army destined for the Holy Land was diverted to Constantinople by the blind, octogenarian but infinitely crafty Doge of Venice - to the painfully protracted struggle against the Ottomans, the closing centuries of the Byzantine era are rich in pathos, colour and startling reversals of fortune. The terrible siege of Constantinople in 1453 ended the empire, founded in the year 330, which Lord Norwich has devoted many years to re-creating; this volume forms the climax to an epic sequence of books.