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Latin Fathers

• The City of GodDe civitate DeiAugustine of Hippo
• The Pastoral RuleRegula pastoralisGregory the Great
• Why God Became ManCur Deus homoAnselm of Canterbury
• On VirginityDe virginibusAmbrose of Milan
• Commentary on EzraIn EsdramJerome of Stridon

Greek Fathers

• Against CelsusContra CelsumOrigen
• On First PrinciplesDe principiisOrigen
• Orations against the AriansOrationes contra ArianosAthanasius
• The Life of MosesDe vita MoysisGregory of Nyssa
• Homilies on the Six Days of CreationHomiliae in HexaemeronBasil the Great

Eastern Fathers

• The Greek Acts of the Persian MartyrsLes versions grecques des actes des martyrs persans
• The Feasts of the MelchitesLes fêtes des MelchitesAl-Bīrūnī
• Homily for the Feast of the AnnunciationHomélie pour la fête de l’AnnonciationAbraham of Ephesus
• The Calendar of Abū’l-BarakātLe Calendrier d’Abou’l-BarakâtAbū’l-Barakāt ibn Kabar
• Universal History, Part IKitāb al-‘UnwānAgapius of Menbij

Medieval

• On the Fourth Book of the SentencesJohn Duns Scotus
• On the Four Books of the SentencesIn Quatuor Libros SententiarumDenys the Carthusian
• A Summa of TheologySumma TheologiaeAlbert the Great
• Commentary on the Sentences, Book IBonaventure
• Catena Aurea on MatthewThomas Aquinas

Roman Catholic

• Collected Works, volume 19OperaFrancisco Suárez
• Disputations on the Controversies of the FaithDisputationes de Controversiis Christianae FideiRobert Bellarmine
• Commentary on the Summa TheologiaeCommentarius in Summam Theologiae S. ThomaeThomas Cajetan
• On Faith, Hope and CharityDe Fide, Spe et CharitateDomingo Báñez
• The AugustinusAugustinusCornelius Jansen

Reference Dictionary of Catholic Theology Vacant, Mangenot and Amann, 1899 to 1950. 1,916 articles, French and English paragraph by paragraph.

Reformed

• Institutes of Elenctic TheologyInstitutio Theologiae ElencticaeFrançois Turretin
• Selected Theological DisputationsSelectae Disputationes TheologicaeGisbertus Voetius
• Commentary on Paul’s Epistle to the EphesiansCommentarius in Epistolam Sancti Pauli ad EphesiosGirolamo Zanchi
• Theological WorksOpera TheologicaFranciscus Junius
• Theoretical and Practical TheologyTheoretico-Practica TheologiaPetrus van Mastricht

English writers

• The Saints’ Everlasting RestRichard Baxter
• The Pilgrim’s ProgressJohn Bunyan
• The Bruised Reed and Smoking FlaxRichard Sibbes
• A Golden ChainWilliam Perkins
• The Marrow of Sacred DivinityWilliam Ames

Lutheran

• The Augsburg Confession, with the ApologyConfessio Augustana cum Apologia ConfessionisPhilipp Melanchthon
• Posthumous Notes on the Gospel of MatthewAnnotationes Posthumae in Evangelium MatthaeiJohann Gerhard
• Didactic and Polemical TheologyTheologia Didactico-Polemica, sive Systema TheologicumJohannes Andreas Quenstedt
• The Old Testament IllustratedBiblia Veteris Testamenti IllustrataAbraham Calov
• An Examination of the Council of TrentExamen Concilii TridentiniMartin Chemnitz
• A Theological Examination for the Lecture HallExamen Theologicum AcroamaticumDavid Hollaz

Humanism and Law

• Collected Works, volume 1Opera OmniaJohn Selden
• Twenty-Six Books on the RepublicDe Republica Libri Sex et VigintiPierre Grégoire
• Ten Books of PoliticsPoliticorum Libri DecemAdam Contzen
• Ten Lectures on the Obligation of ConscienceDe Obligatione Conscientiae Praelectiones DecemRobert Sanderson
• Philosophical Writings, volume 4Philosophische SchriftenGottfried Wilhelm Leibniz