Library

Anselm's extended rational meditation on the divine essence, creation, the Word, and the Trinity.

Anselm's prayerful inquiry into God's existence and attributes, written as faith seeking understanding.

Anselm's dialogue with Boso on the fittingness and necessity of the Incarnation and Christ's satisfaction for humanity.

Hugh of Saint Victor's commentary on Dionysius's *Celestial Hierarchy*, prepared from *Patrologia Latina* 175. The reader contains Hugh's exposition only; Dionysius's quoted Littera is supplied by the linked canonical work.

De Consideratione ad Eugenium (On Consideration, to Eugene) is Bernard of Clairvaux's last major treatise, composed between 1149 and 1152 and addressed to Pope Eugene III, a former monk of Clairvaux whom Bernard had personally formed before his elevation to the papacy. Written in five books, the work is at once a spiritual manual and a mirror for princes: Bernard urges the newly burdened pope not to let the ceaseless business of Rome — litigation, petitions, the "malicious occupations" of the Curia — extinguish the interior life of consideratio, the reflective self-examination that alone keeps action rightly ordered. The treatise moves outward in careful stages, following the fourfold scheme Bernard sets as its architecture: the pope's consideration of himself, of what lies beneath him (the clergy and people of Rome), of what surrounds him (the cardinals and household), and finally of what lies above him, culminating in Book V's ascent toward the contemplation of God, angelic hierarchy, and the divine nature itself. Alongside its mystical and pastoral concerns, the work is notable for its unsparing critique of curial corruption, its meditation on the proper limits of papal power (including the celebrated distinction between the "two swords"), and its warning — startling in an address to a reigning pope — that Eugene's worldly pomp descends "not from Peter, but from Constantine." Blending rhetorical intensity, biblical exegesis, and Cistercian spirituality, De Consideratione stands as one of the most influential texts of twelfth-century ecclesiology and remains a foundational witness to the monastic critique of ecclesiastical power.

Books I–II of Peter Lombard’s Sentences, from the 1971 third edition of the Quaracchi text, with English translation.

A short treatise by Alan on the order of angels.

Alan's manual for preaching, in which the best concepts are offered for composing sermons on almost every moral topic, with specific guidance on how to preach to various groups.

Alan of Lille's De fide catholica contra haereticos sui temporis is a four-book late-twelfth-century exercise in Christian polemic. Written in the scholastic world of Paris and southern France, it organizes arguments against the religious positions Alan associated with Cathars, Waldensians, Jews, and Muslims, using Scripture, patristic authorities, and dialectical reasoning to articulate Catholic doctrine. The work is valuable both as a theological synthesis and as evidence for how learned Latin writers classified and contested religious difference; modern historians caution that its descriptions are polemical constructions, not transparent reports of communities. Schola presents the Latin text and an English translation.

Alan of Lille's De planctu naturae ("The Complaint of Nature") is a twelfth-century Latin prosimetrum in which personified Nature laments human disorder and the misuse of sexuality and language. Probably composed around the 1160s–1170s, it joins Boethian consolation, Chartrian cosmology, Christian moral critique, and elaborate rhetoric. Its allegory helped shape later medieval representations of Natura, especially Jean de Meun's continuation of the Roman de la Rose and the tradition that reaches Chaucer. Schola presents the Latin text with an English translation.

A commentary on the Lord's Prayer by Alan. Latin transcribed from Analecta cisterciensia vol. 31.

A commentary on the Apostles' Creed by Alan.

A commentary on the Nicene Creed by Alan.

Book of parables or proverbs by Alan. Contains moral and religious analogies written in verse. Translated with Sonnet 5. Latin transcribed from PL210, Migne.

A letter by Alan of Lille explaining why a priest should not celebrate Mass twice in a day except in necessity. Latin transcribed from Marie-Thérèse d’Alverny, Alain de Lille: Textes inédits (1965), pp. 290–294; English translation drafted with Sonnet 5 and submitted by the contributor.

A poem against the love of Venus, that is, lust, that warns of the ruin that comes from adultery.

A poem about how the seven liberal arts are related to the incarnation of Christ.

A poem in which the fleeting and perishable nature of man is graphically depicted.

Alan's theological rules, wherein he sets forth over a hundred concise maxims.

Bonaventure's Breviloquium, a concise systematic presentation of Christian theology in a prologue and seven parts. Latin transcription from the Quaracchi critical edition, Opera omnia, tomus V (1882), pp. 201-291.

A brief prefatory introduction to the books of Peter Lombard's Sentences, organized around the scriptural image of the circuit of heaven and transmitted with an editorial argument on circumincession.

Bonaventure's De reductione artium ad theologiam from the Quaracchi critical edition, Opera omnia t. V (1891), pp. 317-325.

Bonaventure's Itinerarium mentis in Deum (1259): the soul's six-step ascent to God through his footprints in the sensible world, his image reformed by grace, and the divine Being and Good, crowned by mystical ecstasy. Latin: Quaracchi critical text; English: Thomas Davidson's 1887 translation improved with AI.

Bonaventure's Lignum vitae (Tree of Life): forty-eight meditations on the life, passion, and glorification of Christ, ordered as twelve fruits on a mystical tree, with a closing prayer for the seven gifts of the Holy Spirit. Latin: Quaracchi critical text; English: new ScholaThomistica translation.

Thomas Aquinas's De aeternitate mundi in the Leonine critical text (Opera omnia, t. XLIII, 1976).

Thomas Aquinas's De ente et essentia in the Leonine critical text (Opera omnia, t. XLIII, 1976), with an aligned English translation.

Thomas Aquinas's De principiis naturae in the Leonine critical text (Opera omnia, t. XLIII, 1976).

The Summa contra Gentiles (1259-1265) is St Thomas Aquinas's great apologetic and missionary work. Liber I of this edition reproduces the critical text of the Leonine Opera omnia, tomus XIII (Rome, 1918), with the commentary of Franciscus de Sylvestris Ferrariensis printed with the text.

The Summa contra Gentiles (1259-1265) is St Thomas Aquinas's great apologetic and missionary work. Liber II of this edition reproduces the critical text of the Leonine Opera omnia, tomus XIII (Rome, 1918), with the commentary of Franciscus de Sylvestris Ferrariensis printed with the text.

The Summa contra Gentiles (1259-1265) is St Thomas Aquinas's great apologetic and missionary work. Liber III of this edition reproduces the critical text of the Leonine Opera omnia, tomus XIV (Rome, 1926), with the commentary of Franciscus de Sylvestris Ferrariensis printed with the text.

The Summa contra Gentiles (1259-1265) is St Thomas Aquinas's great apologetic and missionary work. Liber IV of this edition reproduces the critical text of the Leonine Opera omnia, tomus XV (Rome, 1930), with the commentary of Franciscus de Sylvestris Ferrariensis printed with the text.

Thomas Aquinas's Summa theologiae, Prima Pars, is the first major movement of his mature theological synthesis, composed chiefly in the 1260s and completed at the end of the decade. It begins with sacred doctrine and treats God's existence, attributes, Trinity, creation, angels, providence, and human nature in a deliberately ordered sequence of questions and articles. The work's combination of revealed theology, Aristotelian philosophy, and disputational method made it one of the most influential texts in Western theology and philosophy, generating centuries of commentaries, including Cajetan's. Schola presents the Latin Leonine text.

John Duns Scotus's Ordinatio (also called the Opus Oxoniense) is his revised, authorially prepared commentary on Peter Lombard's Sentences. Scotus began arranging it for publication around 1300 after lecturing at Oxford and continued revising material associated with Paris until his death in 1308; the work therefore remains unfinished and textually layered. Its disputations on God, creation, individuation, freedom, grace, and the Incarnation helped establish Scotism as a major alternative within late-medieval scholastic theology. Schola uses the Vatican critical-edition tradition for the Latin and a separately sourced English translation.

Giles of Rome’s major treatise on ecclesiastical authority, written around 1302 amid the conflict between Boniface VIII and Philip IV of France. It presents a systematic account of papal plenitude of power, placing temporal jurisdiction and legitimate dominion within an order ultimately dependent upon the supreme authority of the Church.

Giles of Rome’s Theoremata de esse et essentia offers a compact yet systematic presentation of some of the central principles of his metaphysics. Organized into twenty-two theorems, the work examines esse as a participated perfection, the metaphysical constitution of created beings, and the real distinction between essence and existence. It also considers the relation of esse to form, causality, and the dependence of creatures upon the first principle. The text follows Edgar Hocedez’s critical edition (Louvain, 1930).

De docta ignorantia (On Learned Ignorance, 1440), in three books: the absolute maximum (God), the contracted maximum (universe), and Jesus Christ. Latin text transcribed from the Rotta 1913 Bari edition.

De visione Dei, or De icona (On the Vision of God, 1453), addressed to the Benedictines of Tegernsee: seeing God through the icon that gazes on all. Latin transcribed from the 1514 Paris Opera; English translation new.

Torquemada's Summa de Ecclesia from the Venice 1561 edition, Books I-IV with the Florentine union apparatus, in Latin with a new English translation.

Denis the Carthusian's Enarratio in Epistolam beati Pauli ad Ephesios is a fifteenth-century Latin exposition of Paul's Letter to the Ephesians by the Carthusian theologian and mystic Denis of Rijkel (c. 1402/03–1471). Written within his immense biblical-commentary project, it reads the Vulgate through the literal, doctrinal, moral, and contemplative concerns of late-medieval monastic theology. It belongs to the Scripture commentaries preserved in the Carthusian Opera omnia, printed in the late nineteenth and early twentieth centuries. Schola offers the Latin text.