Definition
Champ de Mai (from Latin Campus Maii, "field of May") refers to the national assembly of the Frankish people, held annually during the month of May. It was a gathering of Frankish warriors, nobles, and clergy convened under royal authority to deliberate on matters of law, war, and governance. The assembly functioned as both a legislative and military institution in early medieval Frankish political organization, serving as a mechanism through which the Frankish king consulted and commanded the armed host of the realm.
The term appears in legal dictionaries primarily as a historical reference point for the development of early Germanic and feudal public law rather than as an operative legal concept with ongoing doctrinal application.
Common Language
Modern common usage (Wiktionary): Not a standard entry in general contemporary dictionaries; occasionally encountered in historical and political science contexts referring specifically to the Frankish assembly or, by loose analogy, to Napoleonic-era ceremonies of the same name.
Historical common usage (Webster's 1913): Not separately defined; subsumed under broader historical treatments of Frankish institutions.
The gap worth noting: In general historical writing, "Champ de Mai" is sometimes associated with Napoleon Bonaparte's ceremonial assembly of June 1815 — a deliberate revival of the name for political theater — rather than the original Frankish institution. Researchers encountering the phrase in sources must determine which referent is intended, as the Napoleonic usage carries no legal institutional content of the kind addressed in law dictionaries.
Common Confusion
Champ de Mai and Champ de Mars are distinct institutions. The Champ de Mars (Campus Martii, "field of Mars") was an earlier Frankish assembly held in March, associated particularly with the Merovingian period. The Champ de Mai succeeded it under the Carolingians, when the assembly calendar shifted to May. Rapalje & Lawrence's entry cross-references both terms but treats them under the parent entry Campus, reflecting the recognized distinction. Researchers working with sources on Frankish public law should not treat the two as interchangeable; the shift from March to May assemblies marks a meaningful institutional transition in Carolingian administration.
Why It Matters in Research
This term is unlikely to appear as a live legal issue in any primary source corpus. Its presence in law dictionaries reflects the 19th-century legal dictionary tradition of cataloging historical and comparative public law material alongside operative doctrine — a practice most pronounced in Burrill and in the first edition of Black's.
Researchers will encounter Champ de Mai most often in three contexts:
First, in foundational treatments of feudal law and the origins of representative institutions. Legal historians tracing the lineage of parliamentary or legislative assemblies sometimes anchor early accounts in Frankish precedents, including the May assembly.
Second, in comparative constitutional history. The Champ de Mai appears in arguments about whether early Germanic assemblies constituted genuine legislative or consultative bodies — a question relevant to 19th-century debates about the historical roots of constitutional government.
Third, as a cross-reference trap. Rapalje & Lawrence direct the reader immediately to "Campus Maii" without elaborating, while also listing "Champ de Mars" in the same entry block. A researcher skimming the page may conflate the two or miss that both redirect to the same parent entry. Follow the cross-reference chain to Campus before drawing conclusions.
Burrill's citation to "1 Rob. Charles V. Appendix, Note xxxviii" (Robertson's History of the Reign of the Emperor Charles V) is a general historical work, not a legal authority. It signals that Burrill was sourcing institutional history from narrative historiography rather than from legal texts — appropriate for the term, but a reminder that the legal dictionary entry carries no doctrinal weight of its own.
Historical Dictionary Support
The four source dictionaries converge closely on the definition, differing only in minor transcription details. Black's first edition labels the Latin form "Campus Maii"; the second edition renders it "Campus Maiti," which appears to be a typographical error in the original. Burrill provides the identical substantive definition but is the only source to append a citation, pointing to Robertson's historical appendix. Rapalje & Lawrence offer no independent definition, instead cross-referencing Campus Maii and listing adjacent terms (Champ de Mars, Champart, Champarty) in rapid sequence — a format suggesting the compilers regarded these as reference entries rather than terms warranting independent treatment.
None of the historical dictionaries address the Napoleonic revival of the name, which postdates the relevant Frankish institutional context but is the more likely source of confusion for modern readers encountering the phrase in 19th-century political writing.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Feudal Law — Frankish Institutions; Origins of Legislative Assemblies.