The Twisted Crosses on Which Catholics are Being Hung

Dr. John Rao's latest

From Irenaeus to Grotius

A Sourcebook in Christian Political Thought 100-1625, edited by Oliver O'Donovan and Joan Lockwood O'Donovan

Featuring:
Irenaeus of Lyons
Tertullian
Clement of Alexandria
Origen
Lactantius
Eusebius of Caesarea
Ambrose of Milan
John Chrysostom
Augustine
Paulus Orosius
Gelasius I
Agapetos
Justinian
Gregory I
Isidore of Seville (Sentences and Etymologies)
John of Damascus
Joans of Orleans (Institution of the King)
Sedulius Scottus (On Christian Rulers)
The Donation of Constantine
Gregory VII (Dictatus Papae, Letter 8.21)
Norman Anonymous (The Consecration of Bishops and Kings)
Honorius Augustodunensis (Summa Gloria)
Bernard of Clairvaux (On Consideration)
John of Salisbury (Policraticus)
Rufinus the Canonist (Summa Decretorum)
Nikephoros Blemmydes (The King's Statue)
Bonaventure (A Defence of the Mendicants)
Thomas Aquinas
Giles of Rome (On Ecclesiastical Power)
James of Viterbo (On Christian Government)
John of Paris (On Royal and Papal Power)
Dante Alighieri (Monarchia)
Marsilius of Padua (Defens0r Pacis)
William of Ockham (A Dialogue on Papal and Royal Dignity, Eight Questions on Papal Power, A Short Discourse on the Tyrannical Ascendancy of the Pope)
Nicolas Cabsilas (Rulers' Illegal Outrags against Sacred Property)
John Wyclif (Divine Lordship, Civil Lordship)
Antonios IV (Letter 447)
Jean Gerson (On Church Power and the Origin of Law and Right)
John Fortescue (The Nature of the Law of Nature, A Treatise in Commendation of the Laws of England)
Nicholas of Kues (The Catholic Concordance)
Thomas More
Desiderius Erasmus (The Complaint of Peace)
Martin Luther (Temporal Authority: To What Extent It Should Be Obeyed, The Sermon on the Mount, Trade and Usury)
Francisco de Vitoria (The American Indians)
The Schleitheim Articles
Hans Hergot (The New Transformation of Christian Living)
Stephen Gardiner (On True Obedience)
Philipp Melanchthon (Loci Communes)
John Calvin (Institutes of the Christian Religion)
John Knox (The First Blast of the Trumpet Against the Monstrous Regiment of Women, The Appellation of John Knox)
John Ponet (A Short Treatise of Political Power)
Thomas Cartwright (A Reply to An Answer, The Second Reply against the Second Answer)
Vindiciae, contra Tyrannos
Francisco Suarez (Laws and God the Lawgiver, On Charity, Disputation 13, War)
Richard Hooker (Laws of Ecclesiastical Polity)
Johannes Althusius (Politica Methodice Digesta)
William Perkins (A Treatise of Christian Equitie)
The Convocation Book
Hugo Grotius (The Right of War and Peace, The Satisfaction of Christ)

Liberty Fund: Online Library of Liberty

OUP books

The common good in late medieval political thought by M. S. Kempshall
John Locke: Essays on the Law of Nature
Plato, Res Publica
Anthony Kenny, Aristotle on the Perfect Life
Richard Kraut, Aristotle
Joseph Raz: Engaging Reason, The Authority of Law, The Morality of Freedom
Plato Opera Vol. V
De Anima
Aristotle Ars Rhetorica
Aristotle Fragmenta Selecta
Aristotle Atheniensium Respublica

David Hume: social contract
Cicero: De Re Publica
Cavanaugh (Double Effect)De Arte Poetica

Plus... Bonaventure by Christopher M. Cullen
Aristotle De Arte Poetica ?

edit: (June 1)
see also Malcolm Schofield's Plato: Political Philosophy
George, Making Men Moral