Definition
Latin term from feudal and medieval English law meaning fealty or fidelity — specifically, the sworn obligation of loyalty that a tenant owed to a lord as a condition of holding land. Fidelitas named both the abstract duty of faithfulness and the oath by which that duty was formally undertaken. It was the essential bond of the feudal tenure relationship, extracted at the commencement of a tenancy and enforceable as a condition of continued possession.
Common Confusion
Fidelitas and homagium (homage) are related but not synonymous, and conflating them produces analytical error. Homage was the more solemn ceremony — performed only for freehold tenure, involving physical submission and personal acknowledgment of the lord — and it created a more intensive personal bond. Fidelitas was broader: it applied to all tenants, including those holding for a term of years, and it persisted after homage fell out of use. The Co. Litt. maxim makes this hierarchy explicit. Researchers encountering medieval tenure records should treat fidelitas as the genus and homagium as a species applicable only in specific, more elevated tenure contexts.
Why It Matters in Research
Fidelitas is a term a researcher will encounter in medieval land records, feudal tenure treatises, and early English legal sources — not in modern legal instruments. Its primary research significance is navigational: the term appears in Latin records and in commentary on Coke, Bracton, Fleta, and the Feudal Books where it must be distinguished from the closely related but formally distinct concept of homage. The maxim preserved in Coke on Littleton (Co. Litt. 67b) — "De nullo tenemento, quod tenetur ad terminum, fit homagii; fit tamen inde fidelitatis sacramentum" — illustrates the operative legal distinction: a term tenant owed fidelitas but not homagium. Researchers tracing the history of landlord-tenant obligations, leasehold versus freehold tenure, or the decay of feudal incidents in English property law will need to track fidelitas carefully as the broader category of fealty that survived longer and applied more broadly than homage.
The term also surfaces in the plural form fidelitates, which appears in the Registrum Omnium Brevium (Reg. Orig. 317b) in the context of writs relating to multiple feudal obligations. Researchers working with original writ registers should be alert to this plural usage, which is less commonly glossed in secondary sources.
French feudal law used a cognate concept. Guyot's Institutes, citing Dumoulin, describe fidelitas (or its French equivalent) as the essence — l'essence — of a fief. This cross-jurisdictional use is relevant for researchers comparing English and continental feudal doctrine.
Historical Dictionary Support
The historical dictionaries agree uniformly on the core meaning: fidelitas equals fealty. Bouvier is characteristically spare, offering only "Fealty; fidelity" without elaboration. Black's (both editions) and Burrill provide the more useful analytical content.
Burrill is the most instructive, identifying the term's Latin root (fidelis), situating it in feudal and old English law, and flagging the plural form fidelitates — a detail the other dictionaries omit. Burrill also supplies the French feudal law connection via Guyot and Dumoulin, making it the most research-complete of the four sources on this entry.
Black's (1st and 2nd editions) are substantially identical on this entry, both preserving the Co. Litt. maxim with translation. Neither edition adds material beyond what Burrill provides; the maxim is their primary contribution, and it remains genuinely instructive because it encodes the homage/fidelitas distinction in a single sentence.
What the historical dictionaries do not provide: any account of how fidelitas functioned procedurally — how the oath was administered, what breach entailed, or how it was enforced — or any treatment of its decline as feudal tenure was abolished in England. Researchers needing that institutional history must look beyond the dictionary shelf to Blackstone's Commentaries (Book 2, Chapter 4) and Pollock and Maitland's History of English Law.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Fealty; Feudal Tenure; Homage (Historical)