Definition
Latin. In the civil law, a wall — specifically, any constructed wall whether of stone, brick, or earthen construction. The Roman jurists defined it broadly: paries est, sive murus, sive maceria est ("a wall is either a [finished] wall or a rubble wall"). Dig. 50.16.157. The term appears in Roman law primarily in contexts involving property boundaries, building rights, servitudes, and shared structures between neighboring landowners.
The most legally significant derivative is paries communis — a common wall, equivalent to what modern property law calls a party wall. Dig. 29.2.39. This usage governed rights and obligations between adjacent property owners with respect to a shared structural wall.
Common Language
Modern common usage (Wiktionary): The wall of any cavity or organ; also, the triangular middle part of each segment of the shell of a barnacle.
Historical common usage (Webster's 1913): The triangular middle part of each segment of the shell of a barnacle.
In anatomy and biology, paries refers to the enclosing wall of a bodily cavity or organ — derived from the same Latin root but carrying no legal significance. A researcher encountering paries in historical legal sources should not read it in its anatomical sense. The legal meaning is strictly architectural: a constructed wall with property and servitude implications.
Common Confusion
Paries is occasionally conflated with murus in passing references to Roman law sources. The Digest itself distinguishes them: murus implies a more finished or fortified wall, while paries is the broader term encompassing both murus and maceria (a rubble or garden wall). In practice, the distinction rarely affects modern legal research, but it matters when parsing the original Digest text closely. More importantly, researchers should not confuse paries with its derivative paries communis — the former is the general term for any wall; the latter is the specific legal concept governing shared walls between neighbors, carrying mutual rights and obligations that evolved into modern party wall doctrine.
Why It Matters in Research
Paries appears almost exclusively in Roman civil law sources and their reception into early common law commentary. For most Law Mind corpus users, it will surface in one of three contexts: (1) annotations or translations of the Corpus Juris Civilis, particularly the Digest; (2) treatises on property law and servitudes that trace party wall doctrine to its Roman origins; or (3) older English and American legal dictionaries that preserved Latin civil law vocabulary as reference material.
The term itself has no direct operative force in modern Anglo-American law. Researchers who encounter paries in a primary source should treat it as a signal that the surrounding text is drawing on Roman law authority — either to establish doctrinal lineage for a property concept or to interpret a specific servitude or boundary dispute through a civilian lens.
The derivative paries communis is the more research-relevant form. Party wall law in England and the United States has a traceable line back through this concept, and early treatises on adjoining landowner rights will sometimes invoke the Digest directly. If your research concerns party walls, shared boundaries, or servitudes of support, following paries communis back through the historical sources will reveal the Roman doctrinal foundation underlying what became a distinct body of Anglo-American property law.
Note that Rapalje & Lawrence's entry under the relevant alphabetical range does not include paries, instead covering adjacent terms (pardons, parens). This is a gap in that dictionary's coverage. For this term, Black's (both editions) and Burrill are the more reliable historical dictionary sources.
Historical Dictionary Support
All three dictionaries that cover paries — Black's (1st and 2nd editions) and Burrill — are in close agreement: the term is Latin, it belongs to the civil law, and it means a wall. All three cite the same Digest passage (Dig. 50.16.157) and reproduce the same defining phrase. This uniformity reflects the fact that paries is a stable, narrow term with no contested meaning across the historical dictionary tradition.
Black's 2nd edition adds the materially important entry for paries communis and its identification as a party wall, along with a second Digest citation (Dig. 29.2.39). The 1st edition and Burrill do not develop this derivative, which means researchers relying solely on those sources would miss the connection to party wall doctrine.
None of the historical dictionaries situate paries within the broader framework of Roman property servitudes or explain its relevance to modern law. They treat it as a vocabulary entry rather than a doctrinal guide. The practical legal content has to be reconstructed from the Digest itself and from property law treatises that engage with the civilian tradition.
Jurisdictional Note
Paries and paries communis have no direct statutory presence in American or English law under those names. Their influence is indirect, operating through the development of party wall statutes and common law doctrines of support and lateral subjacent rights. Jurisdictions with strong civilian legal heritage — particularly Louisiana — are more likely to have scholarship or case law that references the Roman sources explicitly.
Encyclopedia Cross-Reference
The Law Mind Contracts & Commercial Law Encyclopedia, contracts_36: Defenses — Unclean Hands and In Pari Delicto. The in pari delicto doctrine shares Latin roots and civilian doctrinal lineage relevant to researchers tracing Roman law concepts into Anglo-American legal frameworks.