Definition
1. Boundary marker (property law): A physical monument, marker, or fixed object placed on or along the boundary line between two adjoining parcels of land to identify and preserve that boundary. Traditionally, landmarks took the form of marked trees, stones, posts, iron pins, or heaps of earth. Wrongful removal or destruction of a landmark gives rise to a civil action and, historically, criminal liability as well.
2. Historic landmark (land use/preservation law): A site, structure, object, or district formally designated by a government authority — federal, state, or local — as possessing historical, architectural, cultural, or aesthetic significance warranting protection. Designation typically triggers regulatory consequences, including review requirements for alterations, demolitions, or adjacent development.
Common Language
Modern common usage (Wiktionary): A recognizable natural or man-made feature used for navigation; a notable location with historical, cultural, or geographical significance; a major event or discovery; also, an object marking the boundary of land.
Historical common usage (Webster's 1913): A mark designating the boundary of land (a marked tree, stone, ditch, or heap of stones); any conspicuous object serving as a navigational guide; by extension, important historical events by which eras or conditions are identified.
The gap between common and legal meaning runs in both directions. Ordinary speakers today primarily use "landmark" in the navigational or significance sense — a famous building, a notable event — while the classical legal meaning is strictly the boundary marker. Conversely, the modern legal term "landmark designation" in preservation law is closer to the contemporary common sense than to the historical legal sense. A researcher encountering "landmark" in a historical legal text should default to the boundary-marker definition unless context clearly indicates otherwise.
Common Confusion
Landmark designation vs. National Register listing: These are not the same. National Register listing is a federal honor that triggers procedural protections for federally involved projects but does not directly restrict a private owner's use. Local landmark designation — under a municipal ordinance — is what typically imposes binding review and approval requirements on alterations or demolition. The two can coexist, overlap, or operate independently.
Why It Matters in Research
The two definitions operate in almost entirely different bodies of law and should not be conflated. A researcher working on a boundary dispute will find the original legal meaning — physical marker, surveying law, encroachment remedies — relevant. A researcher working on zoning, takings challenges, or cultural resource law will need the preservation law meaning, which is largely a twentieth-century development.
For boundary marker research: the relevant corpus is property, real estate, and survey law materials. The key legal questions historically were: who placed the marker, does it control over metes-and-bounds descriptions when they conflict, and what remedies follow removal. Statutes criminalizing landmark removal appear early in American legal history and are worth checking in state compilations.
For historic landmark research: the regulatory framework is layered. At the federal level, the National Historic Preservation Act (1966) established the National Register of Historic Places, but listing on the National Register alone does not restrict private property use — it primarily triggers consultation requirements for federally funded or permitted projects. Local landmark designation is where the binding use restrictions typically arise, and these schemes vary significantly by municipality. Takings challenges to landmark designation — testing whether preservation regulation goes too far — are a recurring area of litigation. Researchers should check both the federal preservation framework and local ordinances, which often use their own defined terms.
Corpus traps: Historical legal materials will almost universally use "landmark" in the boundary marker sense. The preservation meaning does not appear in nineteenth- or early-twentieth-century legal dictionaries. Do not assume continuity between the two meanings when reading across time periods. Anderson's Dictionary of Law redirects to MARK and MONUMENT, confirming the older sources treat the term as purely a surveying concept.
Historical Dictionary Support
Black's Law Dictionary (both the original and second editions) defines landmark identically and exclusively as a boundary marker — a monument or erection fixed on the line between adjoining estates. Both editions note that removal is actionable. There is no reference to historic preservation, which is consistent with the era: preservation law as a distinct regulatory field had not yet emerged. Anderson's Dictionary of Law adds nothing substantive, redirecting to related surveying terms.
The historical sources are unanimous on the boundary-marker meaning and silent on everything else. This is not a deficiency in the sources — it reflects the law as it stood. The historic landmark meaning is a genuine doctrinal development of the mid-to-late twentieth century and will not appear in the classical dictionaries regardless of edition.
Webster's 1913 captures the transitional state well: the primary definition is the boundary marker, with secondary senses for navigational guides and metaphorical uses ("landmarks of history"). The metaphorical and cultural senses present in Webster's 1913 eventually fed the legal vocabulary of preservation law, but that migration took decades.
Jurisdictional Note
Historic landmark designation authority and the regulatory consequences that follow vary substantially by state and municipality. Some states have strong enabling statutes creating uniform local preservation programs; others leave municipalities with broader or narrower authority. The takings implications of local landmark regulation have been litigated under both federal and state constitutional provisions, and state courts do not uniformly follow federal precedent on the question.
Encyclopedia Cross-Reference
Historic Preservation — National Register, Local Landmark Designation, Regulation (The Law Mind Property Law Encyclopedia)