Maine State Prison (historic location)

E256037

correctional facility maximum-security prison state prison

Maine State Prison (historic location) was a long-standing maximum-security correctional facility in Thomaston, Maine, that operated from the early 19th century until its closure and replacement by a new prison in Warren.

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All labels observed (3)

Label	Occurrences
Maine State Prison	2
Maine State Prison (Warren, Maine)	2
Maine State Prison (historic location) canonical	1

How this entity was disambiguated

This entity first appeared as the object of triple T2330703 — 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: Maine State Prison (historic location)
Context triple: [Thomaston, Maine, hasFormerInstitution, Maine State Prison (historic location)]

A. Maine Department of Corrections
The Maine Department of Corrections is the state agency responsible for overseeing adult and juvenile correctional facilities, probation, and parole services throughout Maine.
B. Massachusetts Correctional Institution – Plymouth
Massachusetts Correctional Institution – Plymouth is a minimum-security state prison and pre-release facility for men located in Plymouth, Massachusetts.
C. Maine State Museum
The Maine State Museum is the official state museum of Maine, showcasing the state's natural history, cultural heritage, and industrial past through extensive exhibits and collections.
D. Massachusetts Correctional Institution – Bridgewater
Massachusetts Correctional Institution – Bridgewater is a medium-security state prison and treatment facility for male offenders located in Bridgewater, near Brockton, Massachusetts.
E. Massachusetts Correctional Institution – Shirley
Massachusetts Correctional Institution – Shirley is a medium- and minimum-security state prison complex for men located in Shirley, 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: Maine State Prison (historic location)
Target entity description: Maine State Prison (historic location) was a long-standing maximum-security correctional facility in Thomaston, Maine, that operated from the early 19th century until its closure and replacement by a new prison in Warren.

A. Maine Department of Corrections
The Maine Department of Corrections is the state agency responsible for overseeing adult and juvenile correctional facilities, probation, and parole services throughout Maine.
B. Massachusetts Correctional Institution – Plymouth
Massachusetts Correctional Institution – Plymouth is a minimum-security state prison and pre-release facility for men located in Plymouth, Massachusetts.
C. Maine State Museum
The Maine State Museum is the official state museum of Maine, showcasing the state's natural history, cultural heritage, and industrial past through extensive exhibits and collections.
D. Massachusetts Correctional Institution – Bridgewater
Massachusetts Correctional Institution – Bridgewater is a medium-security state prison and treatment facility for male offenders located in Bridgewater, near Brockton, Massachusetts.
E. Massachusetts Correctional Institution – Shirley
Massachusetts Correctional Institution – Shirley is a medium- and minimum-security state prison complex for men located in Shirley, Massachusetts.
F. None of above. chosen

Statements (30)

Predicate	Object
instanceOf	correctional facility ⓘ maximum-security prison ⓘ state prison ⓘ
category	1824 establishments in Maine ⓘ 2002 disestablishments in Maine ⓘ Buildings and structures in Knox County, Maine ⓘ Defunct prisons in the United States ⓘ
city	Thomaston, Maine ⓘ surface form: Thomaston
closure	2002 ⓘ
country	United States of America ⓘ surface form: United States
demolished	2002 ⓘ
formerName	Maine State Prison (historic location) self-linksurface differs ⓘ surface form: Maine State Prison
function	adult male incarceration ⓘ
heritageStatus	site of historical interest in Maine ⓘ
inception	1824 ⓘ
locatedIn	Thomaston, Maine ⓘ
locatedInAdministrativeTerritorialEntity	Knox County, Maine ⓘ
notableFor	historic prison industry and inmate-made crafts ⓘ long-standing role in Maine’s penal system ⓘ
opened	1824 ⓘ
operatedBy	Maine Department of Corrections ⓘ
ownedBy	Maine ⓘ surface form: State of Maine
partOf	Maine Department of Corrections ⓘ surface form: Maine state correctional system
publicPerception	notorious for harsh conditions in earlier decades ⓘ
replaced	Maine State Prison (historic location) self-linksurface differs ⓘ surface form: Maine State Prison (Warren, Maine)
replacedBy	Maine State Prison (historic location) self-linksurface differs ⓘ surface form: Maine State Prison (Warren, Maine)
replacedFacilityAt	Warren, Maine NERFINISHED ⓘ
securityClassification	maximum security ⓘ
state	Maine ⓘ
useAfterClosure	site cleared after demolition ⓘ

How these facts were elicited

Referenced by (5)

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

Thomaston, Maine → hasFormerInstitution → Maine State Prison (historic location) ⓘ

Maine Department of Corrections → oversees → Maine State Prison (historic location) ⓘ

this entity surface form: Maine State Prison

Maine State Prison (historic location) → replaced → Maine State Prison (historic location) self-linksurface differs ⓘ

this entity surface form: Maine State Prison (Warren, Maine)

Maine State Prison (historic location) → replacedBy → Maine State Prison (historic location) self-linksurface differs ⓘ