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 St. Thomas Aquinas (d. 1274)
An excellent introduction to his life and work. From the Catholic Encyclopedia.

 Wisdom Words of Thomas Aquinas
Selected and digested by Joseph Kenny, O.P. Collects quotes on Thomas from Angels and Anger to Temptation and Self-Control. Excellent resource.

 Commentary on the Psalms
In Latin with parallel English translation. Thomas brings out the typological significance of the Psalms and their pointing toward Christ. See his commentary on Psalm 21 for one of our favorite quotes: "Per cor Christi intelligitur sacra Scriptura, quae manifestat cor Christi: By the heart of Christ is understood Holy Scripture, which manifests the heart of Christ." A mirror site can be found here.

 Commentary of St. Thomas on the Book of Job
An important biblical commentary of Thomas, being rendered in a new translation by Father Brian Mullady, O.P. A work in progress. At the bottom of the screen, click "Next" to read chapter-by-chapter.

 Thomas' Catena Aurea on the Gospels
"The Golden Chain" is a series of passages from the Church fathers, woven together by the great Thomas to form a running commentary on the Gospels. A work in progress on the web, so far this on-line edition includes the Gospels of Matthew and Mark.

 Thomas' Commentaries on the Letters of Paul
The unpublished translations by Father Fabian Larcher are not critical editions (i.e., with footnotes, using the most critically up-to-date Latin text etc.) - however they are an excellent resource. Father Larcher also offers a a fine introduction to Thomas' method of biblical interpretation. Made available by the Aquinas Center for Theological Renewal at Ave Maria University. (.pdf files, requires free Adobe Acrobat Reader.)
 - Hebrews 1-6
 - Hebrews  7-13
 - 1 Corinthians 
 - 2 Corinthians
 - Colossians
 - Ephesians - Prologue, Chapters: 1, 2, 3, 4, 5, 6

 Summa Theologica
Aquinas' masterpiece. His treatment of Sacred Scripture begins the book, under "Sacred Doctrine."
- Summa - First Part: Sacred Doctrine. The One God. The Blessed Trinity. Creation. The Angels. The Six Days. Man. The Government of Creatures. 
- Summa - First Part of the Second Part: Man's Last End. Human Acts. Passions. Habits. Vice and Sin. Law. Grace. 
- Summa - Second Part of the Second Part: Faith. Hope. Charity. Prudence. Justice. Fortitude. Temperance. Acts Which Pertain to Certain Men. 
- Summa - Third Part: The Incarnation. The Life of Christ. Sacraments. Baptism. Confirmation. The Holy Eucharist. Penance. 
- Summa - Supplement to the Third Part: Penance (continued). Extreme Unction. Holy Orders. Matrimony. The Resurrection. Appendices.

For another on-line source of the Summa:
- Summa Theologica by Thomas Aquinas

Handy search engines: 
- Search the Summa
- Summa Cite

 For good introductions:
- Synopsis of the Theological Summa of St. Thomas Aquinas
- Companion to the Summa
- Tips on Reading Thomas


 Index of Biblical Citations in the Summa Theologica
A very handy reference tool. Every biblical citation Thomas made is indexed, book-by-book, with a link to the place in the Summa where the citation is used.


 The Hail Mary
Catechetical Instruction by St. Thomas Aquinas on the Hail Mary through the word "Jesus."

 The Apostles Creed
Thomas Aquinas on the Apostles' Creed. Catechetical instruction, taken as a body of twelve articles of faith.

 The Ten Commandments
Catechetical instruction by St. Thomas Aquinas on the Ten Commandments.

 The Lord's Prayer
Thomas Aquinas on the Lord's Prayer, catechetical instruction. Includes an introductory section on prayer in general, one on the opening words, and one for each petition.

 On the Sacraments of the Church
Thomas' catechetical instruction in English.

 Thomas Aquinas in English: A Bibliography
An excellent selection. Note that many of the available works are only partially translated. See also:
- Thomas on the Web

 Corpus Thomisticum
The complete works of Thomas in Latin. See also:
- Thomas in Latin on the Web

 Commentary on the Sentences of Peter Lombard
Latin text and English translation by Hugh MacDonald of In I Sent. prologue and dist. 1, qu. 1, art. 1-5

 On the Eternity of the World
English translation by Rober T. Miller.

 On Being and Essence
English translation by Robert T. Miller.

 Of God and His Creatures
Chapters from the Summa Contra Gentiles of St. Thomas Aquinas translated by Joseph Rickaby, S.J. (1905)

 Reasons for Faith Against Muslim Objections
Translated by Joseph Kenny, O.P.

 Aquinas on Law
An important contribution, often overlooked by students of Thomas.