To these same years belongs the story of Justinian’s invasion of southern Spain, an episode which will be found narrated at full length in the chapter dealing with the Visigoths. We must now turn back to Justinian’s fortunes in the East. It will be remembered that his Second Persian War had been ended by a five years’ truce in 545, after the great plague and gallant defence of Edessa. The five years of peace that followed were not very notable in the history of the empire save for one important event. Theodora, the colleague and other self of Justinian, died of cancer in 548, and with her death much of her husband’s vigour, if not of his persistence, seems to have vanished. Deprived of his councillor and helpmate the emperor became gloomy and morbid. His midnight studies took the direction of theology alone, and he launched out into a futile ecclesiastical controversy on ‘The Three Chapters.’ This was a wholly unnecessary dispute as to whether three documents of three patristic writers, Theodore, Ibas, and Theodoret—all long dead—contained heretical matter or not. But it succeeded in convulsing the whole Eastern Church, and led Justinian into a quarrel with the Roman see, which refused to condemn the ‘Three Chapters.’ He seized Pope Vigilius, and brought him to Constantinople, to compel him to fall in with his own views. [Sidenote: Justinian and Pope Vigilius.] After detaining the unfortunate pontiff in the East for six years, and even dragging him from sanctuary and imprisoning him in an island, the emperor succeeded in inducing him to declare that Theodore and the two other theologians had indeed fallen into grievous heresy (A.D. 553). Justinian was triumphant, but Vigilius found that he had thereby introduced schism into Italy and Africa, where many bishops stood by the ‘Three Chapters.’ An African council went so far as to excommunicate Vigilius, and for a century some of the north Italian churches were out of communion with the Roman see.