Rockland Breakwater Light

E762831

historic place lighthouse

Rockland Breakwater Light is a historic lighthouse at the end of a long granite breakwater in Rockland Harbor, Maine, guiding vessels along the Midcoast Maine shoreline.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (6)

Label	Occurrences
Rockland Breakwater Light canonical	5
Rockland Breakwater Lighthouse	2
Rockland Breakwater	1
Rockland Harbor Breakwater Light	1
Rockland Harbor Breakwater Light Station	1
Rockland Harbor breakwater	1

How this entity was disambiguated

This entity first appeared as the object of triple T8721363 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Rockland Breakwater Light
Context triple: [Midcoast Maine, hasPart, Rockland Breakwater Light]

A. Saybrook Breakwater Light
Saybrook Breakwater Light is a historic offshore lighthouse marking the mouth of the Connecticut River on Long Island Sound.
B. Marblehead Light
Marblehead Light is a historic lighthouse in Marblehead, Massachusetts, that aids navigation in Massachusetts Bay and is notable for its skeletal iron tower design.
C. Nauset Light
Nauset Light is a historic, red-and-white lighthouse on Cape Cod in Massachusetts, known as an iconic coastal landmark and symbol of the region.
D. Owls Head Light
Owls Head Light is a historic lighthouse in coastal Maine, known for guiding ships into Rockland Harbor and serving as a popular scenic and tourist landmark.
E. Long Point Light
Long Point Light is a historic lighthouse marking the entrance to Provincetown Harbor at the tip of Cape Cod, Massachusetts.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Rockland Breakwater Light
Target entity description: Rockland Breakwater Light is a historic lighthouse at the end of a long granite breakwater in Rockland Harbor, Maine, guiding vessels along the Midcoast Maine shoreline.

A. Saybrook Breakwater Light
Saybrook Breakwater Light is a historic offshore lighthouse marking the mouth of the Connecticut River on Long Island Sound.
B. Marblehead Light
Marblehead Light is a historic lighthouse in Marblehead, Massachusetts, that aids navigation in Massachusetts Bay and is notable for its skeletal iron tower design.
C. Nauset Light
Nauset Light is a historic, red-and-white lighthouse on Cape Cod in Massachusetts, known as an iconic coastal landmark and symbol of the region.
D. Owls Head Light
Owls Head Light is a historic lighthouse in coastal Maine, known for guiding ships into Rockland Harbor and serving as a popular scenic and tourist landmark.
E. Long Point Light
Long Point Light is a historic lighthouse marking the entrance to Provincetown Harbor at the tip of Cape Cod, Massachusetts.
F. None of above. chosen

Statements (47)

Predicate	Object
instanceOf	historic place ⓘ lighthouse ⓘ
accessibleBy	granite breakwater walkway ⓘ
automated	yes ⓘ
automationYear	1965 ⓘ
city	Rockland ⓘ linked to: Rockland, Maine
constructionMaterial	brick ⓘ granite foundation ⓘ
country	United States ⓘ linked to: United States of America
county	Knox County ⓘ
foundation	granite breakwater ⓘ
hasAlternateName	Rockland Harbor Breakwater Light ⓘ linked to: Rockland Breakwater Light
hasCategory	Lighthouses in Maine ⓘ Tourist attractions in Knox County, Maine ⓘ Transportation buildings and structures in Knox County, Maine ⓘ
hasFeature	attached keeper’s house ⓘ fog signal building ⓘ lantern room ⓘ
heritageDesignation	National Register of Historic Places listing ⓘ linked to: National Register of Historic Places
lightCharacteristic	flashing white light ⓘ
listedOn	National Register of Historic Places ⓘ
locatedIn	Knox County, Maine ⓘ Maine ⓘ Rockland Harbor ⓘ linked to: Rockland harbor Rockland, Maine ⓘ United States ⓘ linked to: United States of America
locatedInBodyOfWater	Rockland Harbor ⓘ linked to: Rockland harbor
locatedNear	Penobscot Bay ⓘ
locatedOn	Rockland Breakwater ⓘ
locatedOnCoastOf	Midcoast Maine ⓘ
managedBy	United States Coast Guard ⓘ
marking	white tower with red roof ⓘ
navigationSystem	United States Aids to Navigation System ⓘ linked to: United States aids to navigation system
nrhpListingYear	1981 ⓘ
nrhpReferenceNumber	81000071 ⓘ
nrhpType	building ⓘ
openToPublic	yes ⓘ
operatedBy	City of Rockland ⓘ
ownedBy	City of Rockland ⓘ
partOf	Rockland Harbor Breakwater Light Station ⓘ linked to: Rockland Breakwater Light
purpose	aids navigation ⓘ guides vessels into Rockland Harbor ⓘ
region	New England ⓘ
state	Maine ⓘ
towerShape	square tower ⓘ
yearEstablished	1902 ⓘ
yearLit	1902 ⓘ

How these facts were elicited

Referenced by (11)

Full triples — surface form annotated when it differs from this entity's canonical label.

Midcoast Maine → hasPart → Rockland Breakwater Light ⓘ

Knox County, Maine → containsLighthouse → Rockland Breakwater Light ⓘ

Rockland Harbor → hasLandmark → Rockland Breakwater ⓘ

subject linked to: Rockland harbor