Theology -- Early works to 1800
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Broader terms:Narrower terms:- Apologetics -- Early works to 1800
- Church -- Early works to 1800
- Natural theology -- Early works to 1800
- Theology, Doctrinal -- Early works to 1800
- Theology, Practical -- Early works to 1800
- Theology -- 12th century
- Theology -- 15th century
- Theology -- 16th century
- Theology -- 17th century
- Theology -- 18th century
- Theology -- Early church, ca. 30-600
- Theology -- Middle Ages, 600-1500
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Commentationes et Orationes Varii Argumenti (in Latin; Hamburg: Brandt, 1751), by Johann Lorenz Mosheim, ed. by Johann Peter Miller (page images at HathiTrust)- Ioannis Cassiani Presbyteri, Quem Alij Ermitem, Alij Abbatem Numcupant, Opera Omnia: Nouissime Recognita, Repurgata et Notis Amplissimis Illustrata (in Latin; Douai: B. Bellere, 1616), by John Cassian, ed. by Allard Gazet (page images at HathiTrust)
- Luciani Samosatensis Opera, Quae Quidem Extant, Omnia: A Graeco Sermone in Latinum Conversa; Nunc Postremum Multo Diligentius et Melius Quàm Antè, ad Graecum Exemplar Correcta et Emendata (in Latin; Paris: M. Vasconsani, 1546), by Lucian of Samosata (page images at HathiTrust)
- Lucii Caecilii Firmiani Lactantii Opera Omnia: Ad Editionem Parisiensem Joannis Bapt. Le Brun et Nicolai Lenglet du Fresnoi, Anni 1748 Recusa (2 volumes, in Latin; : In Officina Libraria Staheliana, 1783-1784), by Lactantius, ed. by Franz Oberthür
- Disciplinary, Moral and Ascetical Works (The Fathers of the Church, A New Translation, v40; New York: Fathers of the Church, Inc., 1959), by Tertullian, trans. by Rudolphus Arbesmann, Emily Joseph Daly, and Edwin A. Quain (page images at HathiTrust)
- De Fide, Spe et Charitate: Catholico Regi Philippo II, Hispaniarum Monarchae, Scholastica Commentaria in Secundam Secundae Angelici Doctoris Partem, Quae ad Quaestionem Quadragesimam Sextam Protenduntur, Dicata (in Latin; Salamanca: Apud S. Stephanum Ordinis Praedicatorum, 1584), by Domingo Báñez
- The Remainder of Books Written by Jacob Behme (London: Printed by M. S. for Giles Calvert, 1662), by Jakob Böhme, trans. by John Sparrow (multiple formats at archive.org)
- The Works of Jacob Behmen, the Teutonic Theosopher (4 volumes; London: Printed for M. Richardson, 1764-1781), by Jakob Böhme, contrib. by William Law
- The Commonitory of Vincent of Lérins, by Saint Vincent of Lérins, trans. by C. A. Heurtley (HTML at CCEL)
- De Principiis, by Origen (HTML with commentary at CCEL)
- Dialogus Inter Militem et Clericum, Richard FitzRalph's Sermon 'Defensio Curatorum', and Methodius 'Þe Bygynnyng of þe World and þe Ende of Worldes' (EETS original series #167; some attributions of the works here are dubious or spurious; London: Pub. for the Early English Text Society by H. Milford, Oxford University Press, 1925), ed. by Aaron Jenkins Perry, trans. by John Trevisa, contrib. by William of Ockham, Pierre Dubois, Richard FitzRalph, and of Olympus Methodius (page images at HathiTrust; US access only)
- Enchiridion, by Saint Augustine of Hippo, trans. by Albert C. Outler (HTML at CCEL)
- On Modesty, by Tertullian, trans. by Sydney Thelwall (HTML with commentary at CCEL)
- The Philocalia, by Origen (HTML at tertullian.org)
- Proclus' Metaphysical Elements (1909 translation), by Proclus, trans. by Thomas Moore Johnson (multiple formats at archive.org)
- Select Discourses; To Which is Added, A Sermon Preached at the Author's Funeral (4th edition; Cambridge: At the University Press, 1859), by John Smith, ed. by Henry Griffin Williams, contrib. by Simon Patrick
- The Works of Dionysius the Areopagite, Now First Translated into English From the Original Greek, trans. by John Parker, contrib. by Pseudo-Dionysius (multiple formats at CCEL)
- The Works of Lactantius (2 volumes; Edinburgh: T. and T. Clark, 1871), by Lactantius, trans. by William Fletcher, contrib. by Venantius Honorius Clementianus Fortunatus (page images at HathiTrust)
- The Writings of St. Francis of Assisi (Philadelphia: The Dolphin Press, 1906), by Saint Francis of Assisi, ed. by Paschal Robinson (HTML with commentary at sacred-texts.com)
- The Writings of St. Francis of Assisi (translated from the Critical Latin Edition), by Saint Francis of Assisi, ed. by Kajetan Esser (HTML at liturgies.net)
- Truth Triumphant Through the Spiritual Warfare, Christian Labours, and Writings of That Able and Faithful Servant of Jesus Christ, Robert Barclay (Philadelphia: Benjamin C. Stanton, 1831), by Robert Barclay
- The Remains of Thomas Cranmer, D.D. (4 volumes; Oxford: At the University Press, 1833), by Thomas Cranmer, ed. by Henry Jenkyns
- Patrologia Orientalis (partial serial archives)
- Aurora, by Jakob Böhme, ed. by Charles John Barker and D. S. Hehner, trans. by John Sparrow (PDF at Wayback Machine)
- The Works of James Arminius, by Jacobus Arminius, trans. by James Nichols and William R. Bagnall
- The Works of John Knox (6 volumes in 7; Edinburgh: Printed for the Bannatyne Club, 1846-1864), by John Knox, ed. by David Laing (page images at HathiTrust)
- The Works of the Long Mournful and Sorely Distressed Isaac Penington, Whom the Lord in Tender Mercy, at Length Visited and Relieved by the Ministry of That Despised People, Called Quakers (4 volumes; online edition), by Isaac Penington (HTML at qhpress.org)
- The Writings of John Bradford, M.A., Fellow of Pembroke Hall, Cambridge and Prebendary of St. Paul's, Martyr, 1555 (2 volumes; Cambridge: Printed at the University Press, 1848-1853), by John Bradford, ed. by Aubrey Townsend
- Complete Philosophical and Theological Treatises of Nicholas of Cusa, by Nicholas of Cusa, trans. by Jasper Hopkins (PDF files with commentary at Wayback Machine)
- Dialogus (complete Latin text; English translation of most of the text; with notes), by William of Ockham, ed. by John Kilcullen, George D. Knysh, Volker Leppin, John Scott, and Jan Ballweg (HTML in the UK)
- Doctoris Ecstatici D. Dionysii Cartusiani Opera Omnia, in Unum Corpus Digesta ad Fidem Editionum Coloniensium (41 volumes in Latin; Montreuil, France: Typ. Cartusiae S.M. de Pratis, 1896-1913), by Denis the Carthusian (multiple formats at archive.org and HathiTrust)
- The Theological Tractates (English versions of the Tractates only), by Boethius, trans. by H. F. Stewart and Edward Kennard Rand (page images and partial HTML at CCEL)
- The Theological Tractates; The Consolation of Philosophy (in English and Latin; 1918), by Boethius, trans. by H. F. Stewart and Edward Kennard Rand (Gutenberg text)
- Select Works of John Bale, D.D., Bishop of Ossory: Containing the Examinations of Lord Cobham, William Thorpe, and Anne Askew, and The Image of Both Churches (Cambridge: Printed at the University press, 1849), by John Bale, ed. by Henry Christmas, contrib. by John Oldcastle, William Thorpe, and Anne Askew (multiple formats at archive.org)
- Complete Philosophical and Theological Treatises of Anselm of Canterbury, by Saint Anselm, trans. by Jasper Hopkins and Herbert Richardson (PDF files with commentary at Wayback Machine)
- Apologia: La Verdad Contra Varias Imposturas y Acusaciones Publicas (in Spanish; 1697), by Antonio Xaramillo
- A General Representation of Reveal'd Religion: In Which the Chief Prejudices That Have Been Entertain'd Against It, Are Examin'd; and the Practical end Propos'd By It, Recommended, and Rescued From Unfaithful Evasions (London: Printed for J. Walthoe Jr., 1723), by Thomas Rymer (page images at HathiTrust)
- Origines Sacrae: or, A Rational Account of the Grounds of Natural and Revealed Religion; To Which is Added Part of Another Book Upon the Same Subject, Left Unfinished by the Author; Together with A Letter to a Deist (new edition, 2 volumes; Oxford: At the Clarendon Press, 1817), by Edward Stillingfleet (page images at HathiTrust)
- Ad Nationes (in various languages), by Tertullian (HTML with commentary at tertullian.org)
- Address of Tatian to the Greeks (with fragments, and notes), by Tatian, trans. by Jonathan Edwards Ryland (HTML at CCEL)
- Adversus Marcionem (in Latin and English, with notes), by Tertullian, trans. by Ernest Evans (HTML at tertullian.org)
- Against Marcion, by Tertullian, trans. by Peter Holmes (HTML with commentary at CCEL)
- An Answer to the Jews, by Tertullian, trans. by Sydney Thelwall (HTML with commentary at CCEL)
- The Apocriticus of Macarius Magnes (Greek portions omitted), by Macarius Magnes, ed. by T. W. Crafer (HTML at tertullian.org)
- The Apology (from an 1851 edition), by Tertullian, trans. by Temple Chevallier (HTML at tertullian.org)
- The Apology (from an 1889 reprint of a 1709 translation), by Tertullian, trans. by William Reeve (HTML at tertullian.org)
- The Apology, by Tertullian, trans. by Sydney Thelwall (HTML with commentary at CCEL)
- The Apology of Tertullian for the Christians (London and Oxford: Parker and Co., 1890), by Tertullian, trans. by T. Herbert Bindley (HTML at tertullian.org)
- An Appeal to All that Doubt, or Disbelieve the Truths of the Gospel, by William Law (HTML at CCEL)
- Evidences of Christianity (London: W. Clowes and Sons, 1851), by William Paley (multiple formats at CCEL)
- Exhortation to the Heathen (Protrepticus), by Clement of Alexandria (HTML at CCEL)
- The Octavius of Minucius Felix, by Marcus Minucius Felix (HTML with commentary at CCEL)
- Of God and His Creatures (annotated, abridged translation of the Summa Contra Gentiles), by Saint Thomas Aquinas, ed. by Joseph Rickaby (HTML at Notre Dame)
- Pensées, by Blaise Pascal, trans. by W. F. Trotter (HTML at CCEL)
- Pensées et Opuscules (sixth edition in French; Paris: Hachette, 1912), by Blaise Pascal, ed. by Léon Brunschvicg
- A Plea for the Christians, by Athenagoras of Athens, trans. by Benjamin Plummer Pratten (HTML with commentary at CCEL)
- Preparation for the Gospel, by Eusebius of Caesarea, ed. by Roger Pearse, trans. by Edwin Hamilton Gifford (HTML at tertullian.org)
- The Seven Books of Arnobius Against the Heathen, by Arnobius of Sicca, trans. by Hamilton Bryce and Hugh Campbell (HTML at CCEL)
- The Soul's Testimony, by Tertullian, trans. by Sydney Thelwall (HTML with commentary at CCEL)
- The Stromata, or Miscellanies, by Clement of Alexandria (HTML with commentary at CCEL)
- Tertullian On the Testimony of the Soul and On the "Prescription" of Heretics (SPCK, 1914), by Tertullian, trans. by T. Herbert Bindley (HTML at tertullian.org)
- Thoughts, by Blaise Pascal, trans. by W. F. Trotter
- Thoughts; Letters; Minor Works (Harvard Classics edition; New York: P. F. Collier and Son, c1910), by Blaise Pascal, ed. by O. W. Wight, trans. by W. F. Trotter and Mary L. Booth (page images at HathiTrust)
- To Scapula, by Tertullian, trans. by Sydney Thelwall (HTML with commentary at CCEL)
- Anti-Nazarenus: By Way of Answer to Mr. Toland (London: Printed for S. Butler, 1718), by James Paterson (multiple formats at Google)
- Four Discourses Delivered to the Clergy of the Diocess of Sarum (London: Printed for Richard Chiswell, 1694), by Gilbert Burnet (multiple formats at Google)
- Observations on Man, His Frame, His Duty, and His Expectations (sixth edition; London: Printed for Thomas Tegg and Son, 1834), by David Hartley (page images at Google)
- Against Celsus (8 books; commentary appears between Book IV and Book V), by Origen (HTML with commentary at CCEL)
- The City of God, by Saint Augustine of Hippo (HTML at CCEL)
- First Apology, by Justin Martyr (HTML at CCEL)
- Select Treatises of S. Athanasius, Archbishop of Alexandria, in Controversy With the Arians (Oxford: James Parker and Co., 1877), by Saint Athanasius, ed. by John Henry Newman (HTML at newmanreader.org)
- Select Treatises of S. Athanasius, in Controversy With the Arians (London: Longmans, Green and Co., 1903), by Saint Athanasius, ed. by John Henry Newman
- An Apology for the True Christian Divinity, by Robert Barclay, ed. by Licia Kuenning (HTML at qhpress.org)
- An Apology for the True Christian Divinity: Being an Explanation and Vindication of the Principles and Doctrines of the People Called Quakers, by Robert Barclay (multiple formats at CCEL)
- Dialogue With Trypho, by Justin Martyr (HTML at CCEL)
More items available under narrower terms.