Port of Ostia (Portus Traiani)

E70336

ancient Roman harbor archaeological site artificial harbor

The Port of Ostia, known as Portus Traiani, was a major artificial harbor complex of ancient Rome that expanded the city’s maritime capacity and became a crucial hub for Mediterranean trade and grain imports.

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All labels observed (3)

Label	Occurrences
Portus	2
Port of Ostia (Portus Traiani) canonical	1
Portus Traiani	1

How this entity was disambiguated

This entity first appeared as the object of triple T561598 — 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: Port of Ostia (Portus Traiani)
Context triple: [Trajan, constructed, Port of Ostia (Portus Traiani)]

A. Castel Sant'Angelo
Castel Sant'Angelo is a towering cylindrical fortress and former mausoleum on the banks of the Tiber in Rome, renowned for its rich history, papal apartments, and panoramic views of the city.
B. Roman Forum
The Roman Forum is an ancient public square in the heart of Rome that served as the political, religious, and commercial center of the Roman Empire.
C. Portici
Portici is a coastal town near Naples in southern Italy, historically known as a Bourbon royal residence and cultural center in the Kingdom of Naples.
D. Parco archeologico del Colosseo
Parco archeologico del Colosseo is an Italian archaeological park and public institution responsible for preserving and managing Rome’s central ancient monuments, including the Colosseum and its surrounding historic area.
E. Arch of Titus
The Arch of Titus is an ancient Roman triumphal arch in the Roman Forum, commemorating Emperor Titus’s victory in the Jewish War and famed for its reliefs depicting the spoils from the Second Temple in Jerusalem.
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: Port of Ostia (Portus Traiani)
Target entity description: The Port of Ostia, known as Portus Traiani, was a major artificial harbor complex of ancient Rome that expanded the city’s maritime capacity and became a crucial hub for Mediterranean trade and grain imports.

A. Castel Sant'Angelo
Castel Sant'Angelo is a towering cylindrical fortress and former mausoleum on the banks of the Tiber in Rome, renowned for its rich history, papal apartments, and panoramic views of the city.
B. Roman Forum
The Roman Forum is an ancient public square in the heart of Rome that served as the political, religious, and commercial center of the Roman Empire.
C. Portici
Portici is a coastal town near Naples in southern Italy, historically known as a Bourbon royal residence and cultural center in the Kingdom of Naples.
D. Parco archeologico del Colosseo
Parco archeologico del Colosseo is an Italian archaeological park and public institution responsible for preserving and managing Rome’s central ancient monuments, including the Colosseum and its surrounding historic area.
E. Arch of Titus
The Arch of Titus is an ancient Roman triumphal arch in the Roman Forum, commemorating Emperor Titus’s victory in the Jewish War and famed for its reliefs depicting the spoils from the Second Temple in Jerusalem.
F. None of above. chosen

Statements (49)

Predicate	Object
instanceOf	ancient Roman harbor ⓘ archaeological site ⓘ artificial harbor ⓘ
administrativeRegion	Lazio ⓘ
alsoKnownAs	Port of Ostia (Portus Traiani) ⓘ surface form: Portus Port of Ostia (Portus Traiani) ⓘ surface form: Portus Traiani
builtEnvironment	harbor basins excavated inland ⓘ large storage complexes ⓘ massive masonry quays ⓘ
connectedTo	city of Rome via the Tiber River ⓘ road network of central Italy ⓘ
constructedUnder	Claudius ⓘ surface form: Emperor Claudius
constructionStart	reign of Claudius ⓘ
country	Roman Empire ⓘ
currentStatus	archaeological area ⓘ tourist attraction ⓘ
declineReason	changes in coastline ⓘ political and economic crisis of Late Antiquity ⓘ silting ⓘ
designedTo	increase Rome’s maritime capacity ⓘ provide safer anchorage than the Tiber mouth ⓘ
distanceToRome	about 25 kilometers ⓘ
era	Roman Empire ⓘ surface form: Imperial Rome
expandedUnder	Trajan ⓘ surface form: Emperor Trajan
function	Mediterranean trade hub ⓘ grain import hub ⓘ seaport of Rome ⓘ
hasPart	breakwaters ⓘ canals connecting to the Tiber ⓘ docks ⓘ hexagonal basin ⓘ lighthouses ⓘ outer basins ⓘ warehouses ⓘ
locatedIn	Italy ⓘ
locatedNear	Ostia ⓘ Rome ⓘ mouth of the Tiber River ⓘ
locatedOn	Tyrrhenian Sea ⓘ
majorExpansion	reign of Trajan ⓘ
namedAfter	Trajan ⓘ
nearbySite	Ostia Antica archaeological site ⓘ surface form: Ostia Antica
peakUsage	1st century AD ⓘ 2nd century AD ⓘ
precededBy	river harbor of Ostia at the Tiber mouth ⓘ
primaryImports	grain from Egypt ⓘ grain from North Africa ⓘ
significance	crucial for supplying Rome’s population ⓘ key node in Mediterranean trade routes ⓘ

How these facts were elicited

Referenced by (4)

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

Trajan → constructed → Port of Ostia (Portus Traiani) ⓘ

Port of Ostia (Portus Traiani) → alsoKnownAs → Port of Ostia (Portus Traiani) ⓘ

this entity surface form: Portus

Port of Ostia (Portus Traiani) → alsoKnownAs → Port of Ostia (Portus Traiani) ⓘ

this entity surface form: Portus Traiani

Ostia → nearbySite → Port of Ostia (Portus Traiani) ⓘ