Introductions

Bradley, James E; Muller, Richard Alfred. Church History: An Introduction to Research, Reference Works, and Methods (1995)

Extended Works

Philip, Schaff. History of the Christian Church. Eight Volumes:

Volume I, Volume II, Volume III, Volume IV, Volume V, Volume VI, Volume VII, Volume VIII

The Patristic Period

Eusebius Pamphilius from Caesarea. The Church History of Eusebius  (NPNF2-01)

Socrates Scholasticus. Church History (Born c. 380, Read on-line) The work covers the period 305 to 409 and the ourpose is to continue the work of Eusebius.

Theodoret. Ecclesiastical History (Read on-line)

Sozomen. Ecclesiastical History (Read on-line)

Bingham, Joseph. Origines ecclesiasticæ; or, The Antiquities of the Christian Church, and Other Works, of the Rev. Joseph Bingham (1668-1723)

The Eastern Church

Neale, John Mason. A History of the Holy Eastern Church (1847)

Volume 1, Volume 2, Volume 3

The Western Church

Trench, Richard Chenevix.Lectures on Medieval Church History, Being the Substance of Lectures Delivered at Queen's College, London (1879)

Workman, Herbert Brook. The Church of the West in the Middle Ages (1900):

Volume 1, Volume 2

History of The Roman Empire

Gibbon, Eduard. The decline and fall of the Roman Empire (1872) - a non-theological secular source.

Volume I, Volume II, Volume III, Volume IV

Glover, Terrot Reaveley. The Conflict of Religions in the Early Roman empire (1909)

Woodward, Ernest Llewellyn.Christianity and Nationalism in the Later Roman Empire (1916)

Bury, John Bagnell. History of the later Roman Empire : from the death of Theodosius I to the death of Justinian (A.D. 395 to A.D. 565) (1923)

Volume 1, Volume II

Rostovtzeff, Michael Ivanovitch. The social & Economic History of the Roman Empire

Volume I, Volume II (unavailable)

History of The Byzantine Empire

Treadgold, Warren T. A History of the Byzantine State and Society, Stanford University Press (1997)  ( Read on-line )