Definition
In Roman and civil law, the trade or business of dealing in money; the occupation of a banker or money-changer. The term describes not the individual practitioner but the commercial activity itself — the exchange, lending, and management of money as a recognized trade. The argentaria was the business; the person conducting it was the argentarius.
Why It Matters in Research
Argentaria appears almost exclusively in civil law contexts and is not a working term in common law systems. Researchers will encounter it when reading Roman law sources, continental legal treatises, or civil law commentaries that have been incorporated into Anglo-American legal scholarship. Because the term describes a commercial practice rather than a legal status or procedural concept, its significance in historical sources is largely descriptive and definitional — it signals the passage is addressing the law of banking, money exchange, or commercial transactions in the Roman tradition.
The practical research trap is treating argentaria and argentarius as interchangeable. They are not. Sources citing the Digest (Dig. 2.13.4) in connection with argentaria are typically addressing the obligations of money-dealers to produce accounts and records in litigation — a procedural rule with substantive consequences. Researchers working on the history of banking law, commercial obligation, or the duty to disclose financial records will find this entry a gateway term pointing toward the broader argentarius literature.
For Law Mind corpus researchers, argentaria functions as an indexing term. Spotting it in a historical treatise or commentary is a signal to follow the cross-reference to argentarius, where the bulk of civil law doctrine on money-dealers is developed.
Historical Dictionary Support
Burrill's Law Dictionary is the only shelf source to carry this term, and its entry is economical: argentaria is the trade of banking or money-changing, derived from argentum (silver or money), and the reader is directed immediately to argentarius for substantive doctrine. Burrill cites Dig. 2.13.4 and Calvinus's Lexicon Juridicum, both appropriate primary and secondary anchors for a Roman law term.
No common law dictionaries — not Bouvier, not Black's in its early editions — carry argentaria as a headword, which itself reflects the term's limited circulation outside civil law scholarship. This is consistent with the pattern for Latin civil law trade terms that were absorbed into commentary without generating independent doctrinal development in common law jurisdictions.
The Digest citation (Dig. 2.13.4) is genuine and addresses the praetorian edict requiring certain persons, including argentarii, to produce account books (rationes) in legal proceedings. Burrill's cross-reference to argentarius is the correct navigational move: argentaria names the activity, but the legal rules attach to the person.
Jurisdictional Note
Argentaria has no operative meaning in common law jurisdictions. It appears in American and English legal dictionaries solely as a civil law term of historical and comparative interest. Researchers working in Louisiana, Quebec, or other mixed jurisdictions with civil law heritage may encounter the term in older treatises, but even there it is a term of art in Roman law commentary rather than an active legal category.