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:
- 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
- Philosophical commentaries
- Lesser tractates and disputations
- Systematic works (Summa Theologiae, Summa contra Gentiles, and commentary on Peter Lombard's Sentences)
- Biblical commentaries on Job, Psalms and Isaiah, Canticles and Jeremiah, John, Matthew, and on the epistles of Paul
- Liturgical works