Roda Island Nilometer complex
E796746
The Roda Island Nilometer complex is a historic architectural site in Cairo centered around an ancient structure used to measure the Nile River’s water levels for taxation, agriculture, and flood prediction.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Roda Island Nilometer complex canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9384119 — 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: Roda Island Nilometer complex Context triple: [Nilometer of al-Mutawakkil, locatedIn, Roda Island Nilometer complex]
-
A.
Qasr Ibrim
Qasr Ibrim is an important archaeological site in southern Egypt, known for its well-preserved remains spanning Pharaonic, Roman, Christian, and Islamic periods.
-
B.
Pool of Arches
Pool of Arches is an early Islamic-era underground water reservoir in Ramla, Israel, notable for its stone arches and columns supporting a vaulted ceiling above a reflective pool.
-
C.
Al Baleed Archaeological Park
Al Baleed Archaeological Park is a UNESCO-listed archaeological site and open-air museum in Oman showcasing the ruins of an ancient port city that was central to the historic frankincense trade.
-
D.
Temple of Kalabsha
The Temple of Kalabsha is a large, well-preserved ancient Egyptian Nubian temple dedicated primarily to the god Mandulis, relocated in the 1960s to protect it from flooding caused by the Aswan High Dam.
-
E.
Corniche of Alexandria
The Corniche of Alexandria is a scenic waterfront promenade along the Mediterranean Sea in Alexandria, Egypt, known for its coastal views, historic sites, and vibrant urban life.
- 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: Roda Island Nilometer complex Target entity description: The Roda Island Nilometer complex is a historic architectural site in Cairo centered around an ancient structure used to measure the Nile River’s water levels for taxation, agriculture, and flood prediction.
-
A.
Qasr Ibrim
Qasr Ibrim is an important archaeological site in southern Egypt, known for its well-preserved remains spanning Pharaonic, Roman, Christian, and Islamic periods.
-
B.
Pool of Arches
Pool of Arches is an early Islamic-era underground water reservoir in Ramla, Israel, notable for its stone arches and columns supporting a vaulted ceiling above a reflective pool.
-
C.
Al Baleed Archaeological Park
Al Baleed Archaeological Park is a UNESCO-listed archaeological site and open-air museum in Oman showcasing the ruins of an ancient port city that was central to the historic frankincense trade.
-
D.
Temple of Kalabsha
The Temple of Kalabsha is a large, well-preserved ancient Egyptian Nubian temple dedicated primarily to the god Mandulis, relocated in the 1960s to protect it from flooding caused by the Aswan High Dam.
-
E.
Corniche of Alexandria
The Corniche of Alexandria is a scenic waterfront promenade along the Mediterranean Sea in Alexandria, Egypt, known for its coastal views, historic sites, and vibrant urban life.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
archaeological site
ⓘ
historic architectural complex ⓘ |
| architecturalStyle |
Abbasid architecture
ⓘ
Islamic architecture ⓘ |
| builtDuring | Abbasid Caliphate ⓘ |
| city | Cairo ⓘ |
| commissionedBy | al-Mutawakkil ⓘ |
| constructionEnd | 861 ⓘ |
| constructionStart | 861 ⓘ |
| country | Egypt ⓘ |
| currentUse |
educational site
ⓘ
historical monument ⓘ tourist site ⓘ |
| designedBy | Ahmad ibn Muhammad al-Hasib ⓘ |
| era | 9th century ⓘ |
| hasAccess | spiral staircase ⓘ |
| hasFunctionUntil | modern Nile gauge systems ⓘ |
| hasMeasurementScale | cubit markings ⓘ |
| hasPart |
Nilometer well shaft
ⓘ
Roda Island Nilometer ⓘ
linked to:
Roda Nilometer
central marble column ⓘ dome ⓘ inscription panels ⓘ stone staircase ⓘ surface pavilion ⓘ water intake channels ⓘ |
| hasShape | cylindrical shaft ⓘ |
| heritageStatus | protected monument of Egypt ⓘ |
| locatedIn |
Cairo
ⓘ
Egypt ⓘ Roda Island ⓘ |
| locatedOn |
Nile River
ⓘ
linked to:
Nile
|
| materialUsed |
marble
ⓘ
stone ⓘ wood ⓘ |
| nearby |
Manial district
ⓘ
Old Cairo ⓘ
linked to:
Coptic Cairo
|
| openToPublic | true ⓘ |
| religiousContext | Islamic ⓘ |
| river | Nile ⓘ |
| significance |
key instrument for historical Nile flood management
ⓘ
one of the oldest surviving Islamic-era structures in Cairo ⓘ |
| usedFor |
agricultural planning
ⓘ
calendrical observations ⓘ flood prediction ⓘ measuring Nile water levels ⓘ tax assessment ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Roda Island Nilometer complex Description of subject: The Roda Island Nilometer complex is a historic architectural site in Cairo centered around an ancient structure used to measure the Nile River’s water levels for taxation, agriculture, and flood prediction.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.