Definition
Lex Francorum (Latin: "law of the Franks") is one of the early medieval Germanic tribal codes, attributed to the legislative activity of Theodoric I, son of Clovis I, the Frankish king. It was promulgated alongside companion codes for the Alemanni and Bavarian peoples and stands as a distinct body of customary law governing the Frankish tribe. It is not to be confused with the Lex Salica (Salic law), which is the more widely known Frankish legal code and a separate compilation entirely.
As a leges barbarorum — one of the written tribal laws produced during the early medieval period in Western Europe — Lex Francorum reflects the practice of personal law (as opposed to territorial law), under which individuals were governed by the law of their own tribe rather than by the law of the land they inhabited.
Common Confusion
Lex Francorum and Lex Salica are frequently conflated because both are described as "Frankish law" and both originate within the Frankish kingdom. The distinction matters: Lex Salica is the older, more elaborately developed code associated with the Salian Franks and became enormously influential in questions of succession, inheritance, and later constitutional doctrine across medieval Europe. Lex Francorum is a separate and later compilation. Historical sources sometimes use "law of the Franks" loosely enough to encompass both, and researchers must confirm which code a given authority is actually referencing.
Why It Matters in Research
Researchers encountering Lex Francorum in the Law Mind corpus are most likely working in one of three contexts: (1) comparative legal history of the early medieval Germanic codes; (2) historiography of the leges barbarorum as a category; or (3) tracing the ancestry of specific legal doctrines — inheritance rules, wergild, personal law principles — back through Frankish sources.
The principal navigational hazard is terminological imprecision in historical sources. Medieval and early modern writers used "lex Francorum," "lex Salica," and "lex Ripuaria" (the law of the Ripuarian Franks) inconsistently, and the boundary between these codes was not always cleanly drawn by commentators working centuries after the fact. Spelman, cited by both Black's and Burrill's as the authority for the attribution to Theodoric I, is a seventeenth-century antiquarian source; researchers relying on Lex Francorum for precise historical claims should consult primary manuscript traditions and modern critical editions alongside such secondary authorities.
The corpus connections run toward feudal law, succession law, and the broader comparative study of Romano-Germanic legal interaction in the early Middle Ages. Lex Francorum also appears in discussions of the personal law system, where it serves as an example of how tribal affiliation — not geography — determined which law applied to a person.
Historical Dictionary Support
Black's Law Dictionary and Burrill's Law Dictionary are in full agreement on the substantive content: both identify Lex Francorum as the law of the Franks, attribute its promulgation to Theodoric I (son of Clovis I), note its simultaneous promulgation with laws for the Alemanni and Bavarians, and distinguish it from the Salic law. Both cite Spelman as authority.
The Burrill's entry contains an apparent typographical or binding artifact in the digitized text — a fragment of unrelated conflict-of-laws language appears mid-entry ("enforcing the contract, unless the parties... have a view to its being executed elsewhere") that is clearly from an adjacent entry and should be disregarded. It does not reflect any substantive divergence from Black's.
Neither dictionary provides extended analysis, doctrinal elaboration, or guidance on the code's specific provisions. Both function as identification entries rather than analytical ones. Researchers needing substantive treatment of the code's contents must look beyond these dictionary sources to legal historical scholarship.
Jurisdictional Note
Lex Francorum has no operative legal force in any modern jurisdiction. Its relevance today is exclusively historical and scholarly — it appears in legal historical writing, comparative law scholarship, and occasionally in treatises on the origins of European private law concepts.