Corpus Juris Civilis (The Law of Justinian)

The Corpus Juris Civilis — the "body of civil law" — is the great codification of Roman law issued between 529 and 534 CE under the Eastern Roman (Byzantine) emperor Justinian I, compiled by a commission led by the jurist Tribonian. It gathered a thousand years of Roman legal thought into a single authoritative body, and after its rediscovery in eleventh-century Bologna it became the foundation of the civil-law tradition that still governs most of continental Europe, Latin America, and much of the wider world. It is the indispensable root of Western jurisprudence — the source from which concepts of property, obligation, contract, persons, and the very grammar of legal reasoning descend. This entry is a curated landing: the complete Corpus runs to many volumes, so the elementary textbook (Justinian's Institutes) is hosted here in full, and the verified public-domain editions of the whole work are linked below.

Source: S. P. Scott, The Civil Law (1932) — the complete English translation, Public Domain — https://constitution.org/2-Authors/sps/sps.htm

The four parts of the Corpus

The name Corpus Juris Civilis was given later (by the editor Dionysius Gothofredus in 1583) to the four works that Justinian's commission produced:

• Codex Justinianus (the Code). A collection of the binding imperial enactments (constitutiones) then in force. A first edition was promulgated in 529; a revised second edition, the Codex repetitae praelectionis, followed in 534.
• Digesta, or Pandectae (the Digest). Promulgated in 533, fifty books of excerpts from the writings of the classical Roman jurists — Ulpian, Paulus, Papinian, Gaius, and others — given the force of law. It is the heart of the Corpus and the richest surviving source of classical Roman jurisprudence.
• Institutiones (the Institutes). Also issued in 533, a four-book introductory textbook for first-year law students, modelled closely on the earlier Institutes of Gaius. It is the most accessible part of the whole work — and is hosted here in full (see below).
• Novellae Constitutiones (the Novels). The new laws Justinian issued after 534, mostly in Greek. Justinian never compiled them himself; they survive through later private collections.

Why it matters

• It preserved classical Roman law — most of what we know of the great jurists survives only through the Digest.
• Rediscovered and taught at Bologna from the late eleventh century (the Glossators, beginning with Irnerius), it became the basis of the medieval ius commune — the shared learned law of Europe.
• It is the direct ancestor of the modern civil-law codes (the French Code civil, the German BGB, and their descendants worldwide), and it shaped the canon law of the Church and the vocabulary of law itself.

Download the complete Institutes (Justinian's textbook of the law)

The Institutes — the four-book introduction to the whole system — is hosted here in full, free to read and to download:

• Institutes of Justinian — complete English (Moyle): download the full text → — translated by John Baron Moyle (5th ed., 1913). Public Domain.

The complete Corpus — verified public-domain editions

The full Corpus Juris Civilis is very large (the Scott English runs to seventeen volumes), so the complete work is linked rather than mirrored here:

• English — S. P. Scott, The Civil Law (1932): the only complete single-source English translation of the entire Corpus (Institutes, Digest, Code, and Novels). Public Domain (its copyright lapsed without renewal). https://constitution.org/2-Authors/sps/sps.htm
• English — Justinian's Code, Fred H. Blume (annotated): the best modern English of the Code, hosted by the University of Wyoming (freely readable; link only). https://www.uwyo.edu/lawlib/blume-justinian/
• Latin — Mommsen, Krüger, Schöll & Kroll critical edition (Weidmann, 1872–95): the standard scholarly Latin text. Public Domain; page scans on the Internet Archive. https://archive.org/search?query=corpus+iuris+civilis+mommsen
• Latin — Roman Law Library (droitromain, Grenoble): the complete Latin texts including the Novellae (freely readable; link only). https://droitromain.univ-grenoble-alpes.fr/

Provenance & licence: The Corpus Juris Civilis (529–534 CE) is the codification of Roman law issued under the emperor Justinian I and compiled under Tribonian; the modern title was coined by Dionysius Gothofredus in 1583. The complete English translation linked here is Samuel Parsons Scott's The Civil Law (1932), which is in the public domain (its copyright expired without renewal) — it is complete and freely usable, though later scholars (e.g. Kearley) have criticised its accuracy, so it is offered as a historic and complete public-domain edition rather than the scholarly gold standard. The Institutes hosted in full here is John Baron Moyle's public-domain English translation (5th ed., 1913), via Project Gutenberg eBook #5983. The standard Latin text is the Mommsen–Krüger–Schöll–Kroll edition (1872–95), public domain. Reproduced for the M2M² Source Library.