Chapter XIX: Constantius Sole Emperor.—Part I. Constantius Sole Emperor.—Elevation And Death Of Gallus.— Danger And Elevation Of Julian.—Sarmatian And Persian Wars.—Victories Of Julian In Gaul. Chapter XIX: Constantius Sole Emperor.—Part II. Chapter XIX: Constantius Sole Emperor.—Part III. Chapter XIX: Constantius Sole Emperor.—Part IV. Chapter XX: Conversion Of Constantine.—Part I. The Motives, Progress, And Effects Of The Conversion Of Constantine.—Legal Establishment And Constitution Of The Christian Or Catholic Church. Chapter XX: Conversion Of Constantine.—Part II. Chapter XX: Conversion Of Constantine.—Part III. Chapter XX: Conversion Of Constantine.—Part IV. Chapter XXI: Persecution Of Heresy, State Of The Church.—Part I. Persecution Of Heresy.—The Schism Of The Donatists.—The Arian Controversy.—Athanasius.—Distracted State Of The Church And Empire Under Constantine And His Sons.— Toleration Of Paganism. Chapter XXI: Persecution Of Heresy, State Of The Church.—Part II. Chapter XXI: Persecution Of Heresy, State Of The Church.—Part III. Chapter XXI: Persecution Of Heresy, State Of The Church.—Part IV. Chapter XXI: Persecution Of Heresy, State Of The Church.—Part V. Chapter XXI: Persecution Of Heresy, State Of The Church.—Part VI. Chapter XXI: Persecution Of Heresy, State Of The Church.—Part VII. Chapter XXII: Julian Declared Emperor.—Part I. Julian Is Declared Emperor By The Legions Of Gaul.—His March And Success.—The Death Of Constantius.—Civil Administration Of Julian. Chapter XXII: Julian Declared Emperor.—Part II. Chapter XXII: Julian Declared Emperor.—Part III. Chapter XXII: Julian Declared Emperor.—Part IV. Chapter XXIII: Reign Of Julian.—Part I. The Religion Of Julian.—Universal Toleration.—He Attempts To Restore And Reform The Pagan Worship—To Rebuild The Temple Of Jerusalem—His Artful Persecution Of The Christians.—Mutual Zeal And Injustice. Chapter XXIII: Reign Of Julian.—Part II. Chapter XXIII: Reign Of Julian.—Part III. Chapter XXIII: Reign Of Julian.—Part IV. Chapter XXIII: Reign Of Julian.—Part V. Chapter XXIV: The Retreat And Death Of Julian.—Part I. Residence Of Julian At Antioch.—His Successful Expedition Against The Persians.—Passage Of The Tigris—The Retreat And Death Of Julian.—Election Of Jovian.—He Saves The Roman Army By A Disgraceful Treaty. Chapter XXIV: The Retreat And Death Of Julian.—Part II. Chapter XXIV: The Retreat And Death Of Julian.—Part III. Chapter XXIV: The Retreat And Death Of Julian.—Part IV. Chapter XXIV: The Retreat And Death Of Julian.—Part V. Chapter XXV: Reigns Of Jovian And Valentinian, Division Of The Empire.—Part I.