List of works by Thomas Aquinas

The collected works of Thomas Aquinas are being edited in the Editio Leonina (established 1879). As of 2014, 39 out of a projected 50 volumes have been published.

The works of Aquinas can be grouped into six categories as follows:

1. Works written in direct connection to his teaching
   • Seven systematic disputations (quaestiones disputatae), on:
     • Truth;
     • The union of the Incarnate Word;
     • The soul;
     • Spiritual creatures;
     • Virtues;
     • God’s power; and
     • Evil.
   • Twelve quodlibetal disputations
2. Philosophical commentaries
   • Eleven commentaries on Aristotle;
   • Two expositions of works by Boethius;
   • Two expositions of works by Proclus
3. Lesser tractates and disputations
   • Five polemical works;
   • Five expert opinions, or responsa;
   • Fifteen letters on theological, philosophical, or political subjects;
   • Ninety-nine Homilies Upon the Epistles and Gospels for Forty-nine Sundays of the Year
   • A collection of glosses from the Church Fathers on the Gospels (Catena aurea)
4. Systematic works (Summa Theologiae, Summa contra Gentiles, Scriptum super Sententiis)
5. Biblical commentaries on Job, Psalms and Isaiah, Canticles and Jeremiah, John, Matthew, and on the epistles of Paul
   • Nine exegeses of Scriptural books
6. Liturgical works