Summa Theologiae
The whole Summa in English, one page for each of its 611 questions and 3115 articles, from the four Project Gutenberg volumes in the reading room and a transcription of the Supplement.
Each article page has the objections, the reply “On the contrary,” the answer “I answer that,” and the replies to the objections, with a link into the reading room for notes and highlights. Article pages are at /summa/<part>/q<question>/a<article>/; for example First Part, question 2, article 3, “Whether God Exists?”
The four parts and the Supplement
- First Part (Prima Pars): 119 questions, 584 articles
- First Part of the Second Part (Prima Secundae): 114 questions, 619 articles
- Second Part of the Second Part (Secunda Secundae): 189 questions, 917 articles
- Third Part (Tertia Pars): 90 questions, 549 articles
- Supplement (Supplementum Tertiae Partis): 99 questions, 446 articles
Aquinas left the Third Part unfinished at question 90, where the Gutenberg files end. The Supplement, compiled from his earlier writings after his death, completes it here in 99 questions, transcribed from the 1917, 1921, and 1922 printings of the same translation.
About this text: the English Dominican translation, first printed 1911 to 1925. A sample check on 2026-11-09 against pre-1931 printings at the Internet Archive found that the article text matches, with no 1947 introduction, synopsis, or index; “From the Complete American Edition” in Gutenberg’s catalog titles is a provenance note only.
Work page and editions Edition guide
Text: Summa Theologiae, Project Gutenberg #17611, First Part (Prima Pars), translated by the Fathers of the English Dominican Province. The First Part of the Summa in the English Dominican translation (first printed 1911 to 1925; second and revised edition from 1920). A sample check on 2026-11-09 against pre-1931 printings at the Internet Archive (first printings of 1915 and 1916 and the second and revised edition of the 1920s) found that the article text matches, with no 1947 introduction, synopsis, or index. The phrase “From the Complete American Edition” in Gutenberg's catalog title is a provenance note only. Question and article numbers were added by the transcriber. Rights: Public domain (US)
Also online, linked only: the same translation at New Advent and the Latin text at Corpus Thomisticum. Neither is copied here.
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The Supplement is not a Project Gutenberg text. It is Bibliotheca Catholica’s transcription of public-domain scans at the Internet Archive; obvious OCR errors were corrected, and passages marked “OCR uncertain” could not be confidently corrected, so check them against the linked scan page.